godan verb (-u)
rejoice and sing; sing for joy
A compound verb combining 喜ぶ (to rejoice) and 歌う (to sing), used when someone sings out of happiness or celebration.
彼らは勝利を喜び歌った。
They sang in celebration of the victory.
子供たちはクリスマスの朝に喜び歌った。
The children sang joyfully on Christmas morning.