unnecessary

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

not necessary (Freq. 5)
• Syn:
unneeded
• Ant:
necessary
• Similar to:
excess, extra, redundant, spare, supererogatory,
supererogatory, supernumerary, surplus, gratuitous, needless,
uncalled-for, inessential
• See Also:
inessential, unessential
• Attrubites:
necessity