harm /hɑ:m/ I. n.［u］伤害，损害；危害：It will do you no harm. 这对你无害。Too much drinking will do you great harm (do great harm to you). 喝太多的酒对你很有害。come to no harm没受伤，没有受到损害：Most teachers hold that students will come to nogreat harm if they go to a disco now and then. 大多数教师认为学生们偶尔上上迪斯科舞厅并无大害。‖II. vt.伤害，损害： It hasn’t harmed you, has it?那没有伤害你，对吗? Don’t harm your eyes by reading in dim light. 不要在光线暗的地方读书，会伤害你的眼睛。
［辨析］与injure, wound和hurt辨见injure
harmful /ˈhɑ:mful/ adj. 有害的：Is an ant a good or harmful insect? 蚂蚁是益虫还是害虫? The polluted air is harmful to our health.污染的空气对身体有害。
harmless adj. 无害的
