חִיּוּךְ • (khiyúkh) m (plural indefinite חִיּוּכִים, singular construct חִיּוּךְ־, plural construct חִיּוּכֵי־)
Action noun of the verb חייך \ חִיֵּךְ (khiyékh), from the root ח־י־ך (ḥ-y-k).