开颜 (kāi yán) | Meaning: to smile | Chinese Word with Pinyin

face light up with delight (idiom); to beam with joy喜形于色xǐ xíng yú sè

smiles of exultation · radiant with delight眉飞色舞méi fēi sè wǔ

pleasantly smiling · radiant with happiness春风满面chūn fēng mǎn miàn

beaming · radiant with happiness满面春风mǎn miàn chūn fēng

unable to contain one's joy (idiom)喜不自胜xǐ bù zì shèng

grinning from ear to ear (idiom) · beaming with happiness喜笑颜开xǐ xiào yán kāi

to smile · to beam