Proto-IE: *kewǝ-
Meaning: to shout
Old Indian: káuti, kavīti, kavate, kuvate, kū̆nāti `to sound, cry', intens. kokūyate
Old Greek: kōkǘō, aor. kōkǘsai̯ `jammern, wehklagen', kōkǖtó-s m. , kṓkǖma `das Jammern, Wehklage'
Russ. meaning: кричать
References: WP I 331 f