All necessary antonyms
nec·es·sar·y
N n adjective necessary
- extra — Added to an existing or usual amount or number.
adj necessary
- optional — left to one's choice; not required or mandatory: Formal dress is optional.
- unnecessary — not necessary or essential; needless; unessential.
- voluntary — done, made, brought about, undertaken, etc., of one's own accord or by free choice: a voluntary contribution.
- additional — Additional things are extra things apart from the ones already present.
- minor — lesser, as in size, extent, or importance, or being or noting the lesser of two: a minor share.
- trivial — of very little importance or value; insignificant: Don't bother me with trivial matters.
- unimportant — of much or great significance or consequence: an important event in world history.
- nonessential — not essential; not necessary: Nonessential use of gasoline was forbidden during the war.
- inessential — not essential; not necessary; nonessential.
- insignificant — unimportant, trifling, or petty: Omit the insignificant details.
- useless — of no use; not serving the purpose or any purpose; unavailing or futile: It is useless to reason with him.
- contingent — A contingent of police, soldiers, or military vehicles is a group of them.
- needless — unnecessary; not needed or wanted: a needless waste of food.
- secondary — next after the first in order, place, time, etc.
- doubtful — of uncertain outcome or result.