歓
カン, よろこ.ぶ, ぶ
delight, joy
JLPT1 G7 S15 F1065
As per 雚# as described in
勸
(circular uniformity) +
欠
bent, open-mouthed figure → group of like individuals enjoying eating and/or conversing → *pleasure*; *joy*.
[Full Kanji Etymology List]