肆无忌惮 sìwújìdàn unbridled Origin Definitions Defs Strokes Stroke Words Sentences Sents 肆 sì adjectiveverb unrestrained acting without restraint or caution; wanton; reckless无 無 wú adjectiveverb to not have to not have; there is no; lack; (as prefix) non-; un-; -less忌惮 忌憚 jìdàn to fear to be afraid of consequences; to show restraining fear that prevents one from acting recklessly