# Kartvelian Proto-Indo-European *dh(e)g̑ hom- (> Hittite tekan, Greek khthṓn, Irish dú, Old Indic kṣam-, etc.) ‘earth’ → Proto-Kartvelian *diγom- (> Georgian diγom-, diγvam-, etc.) ‘black earth’. Source: [[klein-et2017-21]]