缺点 [词典] shortcoming; defect; weakness; weak point; blemish; [例句]事事不免有缺点。Everything has its drawback.不足 [词典] insufficient; deficiency; not enough; less than; fall short of; [例句]我受到了信息不足的牵累。I was hampered by a lack of information.
缺陷 defective / handicap 她发音有缺陷。 She has a defective utterance 耳聋算是严重的缺陷。 Deafness can be a serious handicap 弱点: weak point / frailty / failing人性的弱点之一是懒惰。 One of the frailties of human nature is laziness 【谚】人皆有弱点。 Every man hath his weak side. 信任一切与不信任任何人,同样是弱点。 It is an equal failing to trust everybody, and to trust nobody