碧海青天 bìhǎiqīngtiān emerald sea and blue sky Origin Definitions Defs Strokes Stroke Words Sentences Sents 碧 bì emerald green bluish green; emerald green; blue海 hǎi noun sea ocean or sea; large bodies of water including salt lakes or large inland lakes青天 qīngtiān blue sky clear blue sky; a bright, cloudless sky