obviate
Word family verbobviatenounobviation
ob·vi·ate /ˈɒbvieɪt $ ˈɑːb-/ verb [transitiveT] formalNEED to prevent or avoid a problem or the need to do something 消除,免除;避免 SYN eliminate The new treatment obviates the need for surgery. 新的疗法免除了手术的必要。
Origin obviate (1500-1600) Late Latin past participle of obviare “to meet, be unharmed by”, from Latin obviam “in the way”