Vocabulary
喜色満面
きしょくまんめん
being all smiles with joy
expression
Example sentences
喜色満面（きしょくまんめん）の笑（え）みを浮（う）かべているけど、彼（かれ）、よっぽど嬉（うれ）しいことがあったんだろうな。
You could tell by the ear-to-ear grin that came to his face that he really had something to smile about.