unnecessary的词根

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unnecessary - WordReference.com Dictionary of English

In Lists: PET Vocabulary List - U, more... Synonyms: unneeded, nonessential, inessential, unessential, needless, more... Collocations: an unnecessary [waste, duplication, expense], was an unnecessary …

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unnecessary - Wiktionary, the free dictionary

5 天之前 · Adjective unnecessary (comparative more unnecessary, superlative most unnecessary) Not needed or necessary. The automatic child-frightener made clowns unnecessary.