köken: Probably from qara-yïgač (“black tree”) (see Proto-Turkic *kara (“black”) and *ïgač (“tree”)). However, Rahmatullayev suggests for the Uzbek term a derivation from *qayïr (“"tree bark"; purportedly "hard, firm, solid"”) and *ïğač (“tree”)). Cognate with Kazakh қарағаш (qarağaş, “Ulmus carpinifolia”), Southern Altai кара-агаш (kara-agaš, “elm”), Uzbek qayragʻoch (“Ulmus carpinifolia”), Uyghur…