Proto-IE: *yekʷ- (Gr h-)
Meaning: play, joke
Old Greek: hepsĭ́ǟ 'amusement, playhing'; pl. épsia n. EM, hépseia Hsch., hepsiáomai 'to amuse oneself' Hom.+
Latin: iocus, -ī, pl. -ī/-a `Scherz, Schäkerei, Kurzweil; Schwank, Spiel, Zeitvertreib'
Other Italic: Osk iúkleí `in cōnsecrātione'; Umbr pl. acc. iuka, iuku n. `precēs'
Russ. meaning: игра, шутка
References: WP I 204 f (differently in Pok.)