expression
beaming with joy; all smiles
A yojijukugo describing a face that is completely filled with a joyful expression. Often used in literary or formal descriptions.
彼は喜色満面で合格通知を手にした。
He held the acceptance letter, his face beaming with joy.
孫の誕生に、祖母は喜色満面だった。
At the birth of her grandchild, the grandmother was all smiles.