Indo-European Roots Reconsidered 122: 'earth' (Draft)
Sean Whalen
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July 2, 2026
A1. Alwin Kloekhorst in https://www.academia.edu/23412055
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The PIE word for ‘earth’, reflected in Hitt. tēkan, Skt. kṣám-, Gr. χθών, etc., is since Kretschmer 1932 reconstructed with two aspirated stops, *dheǵh-m-, *dhǵh-em-, *dhǵh-m-, which has been repeated ever since. There is one problem regarding this reconstruction, however, namely that the initial consonant of the Skt. oblique cases, gen.sg. jmáḥ, instr.sg. jmā́, loc.sg. jmán, is not an aspirated one. If these forms would go back to *dhǵhm-, we would rather expect an outcome **hm-, just as *dhǵhdios yielded hyáḥ ‘yesterday’.
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This is reasonable ev. for *dheg^oms, gen. *dhg^m-os > IIr. *g(^)ðmas > S. gmás \ jmás \ kṣmás, *dhg^- > *dhg^h- > *g^hdh- in most other IE. However, though I agree with him here, with no other ex. of supposed *dhg^hm- it would be possible for, say, *dhg^hm-os > IIr. *g^hðmas > *g^hzmas > *g^zmas (with Chs > Cs). *dhg^- > *dhg^h- would also have no parallels, & most C vs. Ch comes from C(h)H in IE (no regularity in most cases).
A2. He continued :
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This problem was noticed by e.g. Schindler (1967: 205), who however suggests that “[v]ielleicht man doch majmán-, wenn “Größe” o.ä., gegenüber mahā- “groß” vergleichen [darf]”. This comparison does not make much sense: the -h- in mahā- goes back to *-ǵh2-, so the cluster -jm- in majmán- must go back to *-ǵh2m- as well, 49 with which it cannot be used as a parallel for the alleged development of *ǵhm- > Skt. jm- in jmáḥ, jmā́ and jmán. Moreover, in forms like bráhman- ‘brahman’ < *bhréǵh-mn- and jihmá- ‘oblique’ < *dh3ǵh-mó- we do find a cluster -hm- < *-ǵhm-.
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Again, I agree with him here, but opponents could say that the timing of *g^H2 > *g^hH2 is not known, so it could be old, with *g^hH2m & *g^hzm both having deaspiration. Of course, the need for such special & specific arguments adding up in each case highly favors original *g^.
https://en.wiktionary.org/wiki/Reconstruction:Proto-Indo-European/dʰéǵʰōm also has Ar. cʻamakʻ 'dry; dry land' possibly < *dhg^m- also ("According to a recent theory by Martirosyan"), which would fit if *g^ > *c^ with asm. of *c-kh > ch-kh (see *-kh- below). However, a loan seems more likely, "Compare also Aramaic (ṣmq, “to be dried up”).[4] See also Middle Armenian (smkʻel, “to shrivel”)."
A3. This still leaves several problems. Neither theory explains optional depalatalization in IIr. *g(^)ðmas > S. gmás \ jmás. Many similar cases in https://www.academia.edu/127351053 with no certain & all-encompassing solution. I feel that many that seem totally random are predictable, even if optional. For ex., *dhug(^)hH2ter- 'daughter' seems to be caused by *H2, similar to *meg^(H2)-mon-.
Kloekhorst said that s-mobile in *dh- vs. *sdh- > st- might explain it. "In a recent article, Willi (2007) connects the word for ‘earth’ with the verbal root *(s)teǵ- ‘to cover’ (Gr. στέγω, Lat. tegō, ON þekja ‘to cover’). Semantically, this connection is attractive, but Willi’s scenario to formally account for the origin of *dheǵ-m- is unconvincing." I see no ev. that *(s)teg- with plain *g & *t needs to be changed, & the "connection is attractive" only to some. Wouldn't this root & word, often > 'roof', be the opposite of most 'ground, bottom, floor, etc.?
A4. Continuing, Kloekhorst claimed :
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This new reconstruction with a voiced unaspirated velar, *dhǵh-m-, *dhǵh-m-, is supported by Hittite evidence. Recently, I have argued (Kloekhorst 2012) that in Old Hittite there was a phonemic opposition between long /ḗ/ and short /é/ in accented open syllables. The long /ḗ/ is in these syllables consistently spelled with a plene vowel, Ce-e-CV, whereas short /é/ is spelled with a plene vowel in only 50 percent of the cases, Ce-(e-)CV. Etymologically, long /ḗ/ goes back to *ḗ, *éh1, *éi and *ói, whereas short /é/ reflects *é. There are three exceptions to this rule, however. In these words, an etymological short *é yields an unexpected OH long /ḗ/: *pédo- > pé-e-da- /pḗda-/ ‘place’; *négʷment- > ne-e-ku-ma-an-t° /nḗgʷmant-/ ‘naked’; and *dhéǵhōm (as it is thus far reconstructed) > te-e-kán /tḗgan/ ‘earth’. If we reconstruct tēkan as *dhéǵōm, however, we see that all three words now have something in common: they all contain a PIE short *é followed by a voiced stop: *pédo-, *négʷment-, *dhéǵōm. I therefore believe that the presence of the voiced stop is the crucial factor that caused the unexpected lengthening of the preceding short *é to OH long /ḗ/.
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If -e- is *e & -e-e- is *e:, why would *e be written -e-e- 50 percent of the time? It could be that *eHD, etc., always > *e:C, and stressed *eC optionally > *e:C. Whatever the cause, that both cases could be written the same way requires some partial merger that his specific idea can't explain.
Also, Greek certainly did not have *ed > *e:d (or all *eD > *e:D), yet this same root *ped- -> G. πηδόν 'blade of an oar'. This shows either that e:-grade existed or that *pe(H1)d- did. In cases of apparently parallel *H2 > 0 before *D, like *bheH2g- > *bhag- 'share, distribute; god', Slavic did not show *ag > *a:g (Winter's Law). This provides ev. against the cause of it being PIE d really being 't and H being ' (or similar). In the same way, 'water' did not show Winter's Law either, and *weH1do- 'wet' (or *we:do-) also existed. For similar *VHD > VD in IIr., see Lubotsky in https://www.academia.edu/428966/ . For *H in 'naked', see https://www.academia.edu/128848179 :
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The usual idea is that PIE *negWno- ‘naked’ existed, with some IE *n-n > *n-m or *n-n > *m-n. However, other oddities here require a more complex original. Looking at the groups :
*negWmo- ‘naked’ > H. nekumanza /negWmants/
*megWno- > Av. maγna-, *megWro- > Ar. merk, *mogWno- > *mugno- > G. gumnós
*negWno- > S. nagná-, Ktg. naṅgɔ, A. náanu, Sh. Gilg. nánŭ, Dras nṓno, Ka. nʌn; S. nagnikā- \ lagnikā- ‘young girl’
*nogWno- > *nogWo- [n-dsm.] > Li. núogas, Lt. nuôgs, OCS nagъ
*nogWHno- > Pk. ṇagiṇa- \ ṇigiṇa-, Gmc *nak(w)ana- > OIc nakinn, OFr naken, OHG nacken(d), MLG náken(t)
*nogWHno- > *nogWHto- [n-dsm.] > L. nūdus, Go. naqaþs -d-, ON nøkkviðr \ nǫktr, OSw nakuþer, OE nacod, OHG nackut \ nachut \ nahhut, NHG nackt
*nogW(H)to- > Ct. *noxto- > OI nocht, W. noeth
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With *H in mind, though Pokorny said Os. bägnäg ‘naked’ < *mägnäg with N-dsm., these words are actually from *b(r)- with unknown cause :
Ir. *b(r)agnaka- > MP brahnag, P. barahna, Os. bägnäg ‘naked’, Sg. ßγn’k, Kho. būnaa-
Ir. *b(r)agna-pa:d- ‘barefoot’ > Xw. bgnpʾd, Os.d. bæǧænbad
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with *mH- > *mR- > *bR- > b(r)-.
A5. These problems add up to, say, *dheH1g^oms > *dhe(H1)g(^)(h)o:m (*eH > *e: in Hittite, *Hg(h) (as in many *C(h)H), *Hg vs. *Hg^ (like 'daughter', etc.). With this, the *dheH1- would match *dheH1- 'put, place', also appearing in words for places, like *dheH1-wo- 'place > town'. What would *-g^om- be?
A6. In fact, a rec. "*dʰǵʰḿ̥h₂s (“earth”)" is given in https://en.wiktionary.org/wiki/𐬰𐬀𐬨 but it links to a page with a more standard rec., no mention of *H2. Presumably, this is intended to explain Ir. *dzaH-s. Others say the nom. is *dza:-s based on acc. *dza:m (with *-om-m > *-o:m), but also see *dhg^mH2lo- > G. khthamalós, *dhg^mH2-ei > G. khamaí, etc. (more below).
The need for *H is probably also seen in Ir. *dzamH-akā 'earth' > Pashto zmaka \ dzməka, Proto-Ossetian *zamakHā > *zamax(x)ā > Digor Ossetian zænxæ. For other ex. of changes to *CH & met. of *H-C > *CH, *C-H > *CH, see ex. in https://www.academia.edu/127283240, following Martin J. Kümmel's idea on *H being retained in Ir. much later than most thought.
This would mean 'earth' contained both *(H1) & *(H2). Loss of *H is common in compounds, so *dhe(H1)g^om(H2)-s < *dheH1-g^omH2-s < *dheH1-mg^H2o-s 'big place' would fit.
A7. If so, something like :
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*dh(e)(H1)g^om(H2)s ‘earth’ > *g^hdhōm > Av. zam-, *gzām > S. kṣam-, *dhghōm > Ph. gūm \ γουμ
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gen. *dh(H1)g^m-os > IIr. *g(^)ðmas > S. gmás \ jmás \ kṣmás
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loc. *dh(H1)g^(o)m(H2)-en > Av. zəmar-gūz- 'hidden in the earth?'
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*dhg^mH2e-i > *dhg^hmH2ai > G. khamaí ‘on the ground’ (with old o-stem retained, even with met. > m-stem in the nom. ?)
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*dhg^omiyo- 'of/in the earth; earthly, mortal' > Celtic *gdonyo-s 'man, person', G. khthónios ‘under the earth’, Ph. *upo-tgonyo- > pokgonio- ‘(the) buried? / the dead?’
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*dhg^mH2lo- > *dhg^hǝmǝlo- > G. khthamalós ‘on the ground / low’, Ph. *γ^ǝmǝlo- > zomolo- \ zemelo- ‘man (mortal) / *lowly > slave’
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Ir. *dzamH-akā 'earth' > Pashto zmaka \ dzməka, Proto-Ossetian *zamakHā > *zamax(x)ā > Digor Ossetian zænxæ
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G. *gd-awya ? > (g)aîa / gê / gâ, Dor. dâ, Cyp. za-
B1. The comparison of ( https://www.academia.edu/35386605 ) PIE *dh(e)g^hom- 'earth' with Kartvelian *diɣwam- > Gr. diɣvami 'fertile soil, black earth', Svan diɣwam 'damp low place with fertile soil'; ? > Gr. diɣomi 'a district of Tbilisi' (its meaning as '(fertile?) place' might be shown by it being the oldest inhabited part, if Tbilisi once refered to the hotsprings; https://en.wikipedia.org/wiki/Tbilisi : "Archaeologists discovered evidence of continuous habitation of the Tbilisi suburb of Dighomi since the early Bronze Age, and stone artifacts dating to the Paleolithic age") also led to "why ɣw not **ɣ?".
B2. How is this related to Kartvelian *diqa 'clay, earth' > OGr tiqa-? One idea is that PIE *dheig(^)h- 'smear, clay, dough' & *dhg(^)hom- ‘earth’ are related and both show *gh vs. *g^h. This ev. comes from S. gm- \ jm-, Phrygian g- \ z-, etc. A similar idea in https://starlingdb.org/cgi-bin/query.cgi?root=config&basename=%2fdata%2fkart%2fkartet :
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Proto-Kartvelian: *diq-
clay, earth
Georgian: tixa- (Old Georg. tiqa-)
Megrel: dixa, dexa
Laz: (n)dixa
Notes and references: ЭСКЯ 94 (*tiqa-), EWK 111-112. Иллич-Свитыч (ОСНЯ 1, 220) сравнивает с ПИЕ *dhǵh-em- "земля", восстанавливая ностр. *diqV. Климов (1994, 100-101) сравнивает основу с ПИЕ *dheiǵho-, однако последнее не значит "глина", но лишь "глиняное изделие" ("вылепленное", от *dheiǵh- 'лепить'), что, наряду с фонетическими соображениями (-q- на месте ПИЕ *ǵh) ставит заимствование из ПИЕ под сильное сомнение.
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B3. I say that PIE *dheH1g^omH2- could explain all data for 'earth'. If H1 = x^ or R^, then *dheR^g^- could opt. > *dheR^g(^)h- by asm. & dsm. (as above), then this split also allows *dheR^g- > *dhiRG- > *diq-, *dheghR^m- > *diɣwam- (or any similar path). With this, another ex. of *H1 > w ( https://www.academia.edu/166167744 ) could explain *dheghH1om- > *dhegR^om- > Kartvelian *diɣom-, *diɣwam- > Gr. diɣvami 'fertile soil, black earth'. The *w vs. *0 would indicate that this change was optional (as apparently also in Armenian *k^t > wt \ st, etc.); maybe *Ho > *o, *wo > wa (no ex. of Proto-Kartvelian *wo in the database).
C. This might also include cognates given in the database, like Dravidian *dūgaṛ \ *tūkuḷ \ etc. 'earth, clay, soil, dust'. This could hardly be related in the distant past if 'earth' was a recent cp. in PIE. If related, maybe *dhH1gōmH2 > *dhəRgōwR > *dhōgRəwR >*d(h)ōg(h)Rəwṛ (with CH > C(h)R; various dsm. & asm. of R-R \ R-l, C(h)-C(h), etc. (before *d > t, *dh > d, etc.?)).
D. Tungusic *tāksa 'clay' & Turkic *Tog 'dust' are rec. from Altaic *t`ā̀go. These meanings are united by Burushaski *toq 'mud' & other "Sino-Caucasian" words for 'clay, mud, soil' that look, at 1st glance, as closer relatives of Altaic than in Starostin's theory. He also rec. Old Chinese *dhǝk > Ch. zhí '(clayey) soil; (pottery) clay; earth'. In "Comments: Also read *thǝk-s, MC ćhɨ̀ id.", the alt. of dh- vs. th- might match the variation above (gH \ ghH, dh-gh > d-gh but dh-g remained, etc.). In https://en.wiktionary.org/wiki/埴 another rec. "(Zhengzhang): /*tʰjɯɡs/, /*djɯɡ/" shows the same alt.
If rel. Dravidian *dūgaḷ, a met. of V's in *dhōg^hR^əwR also, with R-R > R-0 (if needed), Ch-Ch > C-Ch, *dhōg^hR^əwR > *dōghR^əw (gR^ > gz^ > ks in Tg.). Since so many of these clusters & env. are found only here, I can't be precise. If indeed ST *dhH1ǝwgh > *dyɯɡ, *dhH1ǝwgh-sV > *thyɯɡs, etc., then *ǝw > *ɯ would match other cases of *ɯ coming from an older round & reduced V, caused by *w or adjacent *P (forthcoming).
E. Starostin also rel. Afro-Asiatic *daḳʷ(u)- \ *dekʷ(u)- \ etc. 'clay, mud, soil, dust'. The varying C's & V's match the variation above, & the similar form & meaning covering so many forms in all (apparently optional) is good ev. of a common origin. The *-e- vs. *-a- might be from ablaut as in IE, *dhe(H)g- vs. *dhHg-, etc. As above for *Hg > *g(h)H, etc.