Synonym: excess, needless, superfluous, uncalled-for, unessential. Antonym: necessary. Similar words: necessary, necessity, make a virtue of necessity, incessant, recess, cessation, incessantly, recession. Meaning: adj. not necessary.
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1. I don't want to encumber myself with unnecessary luggage.
2. We should save unnecessary expenses.
3. There's no sense in taking unnecessary risks.
4. She often pothers herself over unnecessary details.
5. All this fuss is totally unnecessary.
6. The slaughter of whales is unnecessary and inhuman.
7. There's no point in taking unnecessary risks.
8. I paid that well, but was felt unnecessary pain.
9. They were found guilty of causing unnecessary suffering to animals.
10. We should trim off the unnecessary parts of our spending.
11. Unnecessary anxiety has been caused by media hysteria and misinformation.
11. Wish you can benefit from sentencedict.com and make progress everyday!
12. Explanation is unnecessary, because people know you do not need it.
13. In writing this report I have omitted all unnecessary details.
14. We edited out some unnecessary words or sentences from the draft.
15. He cancelled many unnecessary words in his manuscript.
16. This comma is unnecessary, mark it out.
17. They viewed his actions as unnecessary.
18. This renders it unnecessary for me to do anything.
19. Don't labour the reader with unnecessary detail.
20. It's unnecessary to cooka big meal tonight.
21. You've caused us all a lot of unnecessary worry.
22. We can't afford any unnecessary delays.
23. Don't worry the driver with unnecessary requests.
24. Prune out any unnecessary details.
25. Try to avoid unnecessary waste.
26. Please, Mary, this is all so unnecessary.
27. Lose not time; be always employed in something useful; cut off all unnecessary actions. 
28. I found a lot of the violence in the film totally unnecessary.
29. They will be concerned to cut back expenditure on unnecessary items.
30. She made one or two snide remarks about their house which I thought was a bit unnecessary.
More similar words: necessary, necessity, make a virtue of necessity, incessant, recess, cessation, incessantly, recession, secession, recessive, tunnel, runner, stunned, connect, connected, connection, adversary, anniversary, be connected with, essay, go to pieces, mess about, excess, access, process, success, cession, mary wollstonecraft, excessive, processor.