You have spelled it correctly.
The likely word is necessary (required).
The word "necessary" means required or essential.
The word meaning required is spelled "necessary".
The word has one C and two S's, as "necessary".
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The likely word is "vitamin" (necessary metabolic compound).
The likely word is "nutrition" (receiving necessary materials from food).
The likely word is the adverb accordingly (as is necessary or proper).The word accordantly means harmoniously.
The word "necessary" is an adjective, and has no plural. The noun form "necessity" has the plural form "necessities."
About nine.
The likely word is "imperative" (immediately necessary).ANS 2 - Or it could be 'inoperative', -not working.
The correct spelling of this word is necessary.Some example sentences are:Is that really necessary?We will need to bring the necessary clothing for the trip.