命いのち知しらずいのちしらずFreq.FrequencyTop 100,000Meanings1noun, noun which may take the genitive case particle 'no', na-adjectiverecklessness; daredevilry; reckless personDescribes a person or action that disregards danger or risks one's life. Can be used as a noun or adjectivally with な or の.彼かれは命いのち知しらずの冒ぼう