长叹 chángtàn to sigh deeply Definitions Defs Origin Strokes Stroke Words Sentences Sents 长 長 cháng adjective long long in space or time; lasting叹 嘆 tàn verb to sigh (bound form) To exhale deeply to express sadness, frustration, or exhaustion; to sigh. Often used in 叹气 tànqì.