necessitate

1. V-T If something necessitates an event, action, or situation, it makes it necessary. 使成爲(wèi)必需[正式]

A prolonged drought had necessitated the introduction of water rationing. 一場(chǎng)持續(xù)的乾旱使定量供水的引進(jìn)成爲(wèi)必需。