FromProto-Tocharian*w'īkän, fromProto-Indo-European*(d)wi(h₁)dḱm̥ti (cognate withLatinvīgintī,Ancient Greekεἴκοσι(eíkosi), Doricϝείκατι(weíkati),Sanskritविंशति(viṃśati),Avestan𐬬𐬍𐬯𐬀𐬌𐬙𐬌(vīsaiti),Ossetianинсӕй(insæj),Armenianքսան(kʻsan),Albanian(një)zet,Welshugain). CompareTocharian Awiki andTocharian Bikäṃ, both of which seem to be from the same PIE form.
ikäṃ