What is the opposite of necessary?

Need antonyms for necessary? Here's a list of opposite words from our thesaurus that you can use instead.

Adjective
Opposite of imperative or essential for one's well-being or goals
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“Expensive cameras are unnecessary for us to complete this basic shoot.”
Adjective
(avoidable) Opposite of happening by natural laws or predestination
“Such stringent sanctions may be avoidable if negotiations resume between the two leaders.”
Adjective
(uncertain) Opposite of happening by natural laws or predestination
“It remains uncertain if this natural phenomenon will manifest itself again in our lifetimes.”
Adjective
(impossible) Opposite of happening by natural laws or predestination
“It is impossible that a person with a poor command of language will find success as a writer.”
Adjective
Opposite of impossible to avoid
Adjective
Opposite of occurring as natural consequence
Adjective
Opposite of proper, right
Adjective
Opposite of requiring immediate or vigilant action or attention
“Anxieties regarding respectability were often concealed by seemingly trivial complaints over children, gardens or noise.”
Adjective
Opposite of anticipated or expected
Adjective
Opposite of beneficial or being of advantage in a given circumstance
Adjective
Opposite of done against someone's will
Adjective
Opposite of irrefutable, or impossible to deny
Adjective
Opposite of relating to, or forming, the base, or point of origin
Adjective
Opposite of significant in importance or esteem
“No offense, but your useless opinion on this matter isn't really required.”
Adjective
Opposite of critical, serious or very important in nature, usually in a negative sense
Noun
(rare) Opposite of something necessary or indispensable
Noun
Opposite of the official currency, in the form of banknotes or coins, issued by a government
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