突飞猛进 tūfēiměngjìn to advance by leaps and bounds Origin Definitions Defs Strokes Stroke Words Sentences Sents 突 tū adverb suddenly suddenly; abruptly; unexpectedly飞 飛 fēi verbadverb swiftly to move at high speed猛进 猛進 měngjìn to progress rapidly to make sudden and swift progress, often used in the context of development or achievement