necessary adj.

VERBS be, prove, seem | become | remain | make sth The cold weather has made it necessary to protect the crops. | consider sth, feel sth, find sth, regard sth as, see sth as, think sth Make any alterations you consider necessary. You may find it necessary to readjust the wheels from time to time.

ADV. really, strictly I was determined not to stay in hospital for any longer than was strictly necessary. | absolutely | causally, logically

PREP. for qualifications which are necessary for work with the under-fives

PHRASES if necessary These measures will be enforced, if necessary, by the army. | as/when/where necessary We are here to give help and support when necessary.

You can also check other dicts: necessary (English, 中文解释 ), wordnet sense, Collins Definition

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