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nec·es·sar·y

necessary

 
 
pronunciation:
ne s ser i
part of speech: adjective
definition 1: needed; not able to be put aside.
My brother does not have the cash necessary to buy a car.A strong goalie is a necessary part of a soccer team.
synonyms:
essential, indispensable
antonyms:
needless, unnecessary
similar words:
basic, fundamental, needed, vital
definition 2: expected or needed under given circumstances.
He made the necessary arrangements for his guests.
synonyms:
compulsory, expected, required
antonyms:
needless, unnecessary
similar words:
customary, usual