1640s, "not legally answerable for conduct or actions," from assimilated form of in- (1) "not, opposite of" + responsible. Meaning "not acting with a sense of responsibility" is from 1680s. Related: Irresponsibly.
例文
1. She described his remarks as irresponsible ,inframmatory and outrageous.
彼女は彼の話を無責任で扇動的で極端に無礼だと言った。
2.Many people have an irresponsible attitude towards marriage and relationships.結婚と両性関係に対して無責任な態度をとる人が多い。
3.Thick patchy fog and irresponsible driving were to blame.
局所濃霧と運転者の無責任が元凶である。
4.Green-field was behaving like an irresponsible idiot.