unnecessary
Anything that is extra or not needed is unnecessary. Wearing long underwear in July is an unnecessary precaution against being cold.
If you don't need something, it's unnecessary. You take an unnecessary risk if you get in the car and don't bother to fasten your seatbelt. Driving your car when you could ride a bike instead is an unnecessary use of gasoline. If you keep dropping you pen in class, your teacher might say, "That's unnecessary." Walking your dog with two leashes is definitely unnecessary. That's obvious, but lots of times it's hard to tell what's necessary and what's unnecessary.
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not necessarysynonyms: unneededexcess, extra, redundant, spare, supererogatory, superfluous, supernumerary, surplusmore than is needed, desired, or requiredinessentialnot absolutely necessarysparekept in reserve especially for emergency useantonyms:necessaryabsolutely essentialobligatorymorally or legally constraining or bindingessentialbasic and fundamentalindispensablenot to be dispensed with; essentialincumbentnecessary (for someone) as a duty or responsibility; morally bindingobligatoryrequired by obligation or compulsion or convention
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Vocabulary lists containing unnecessary
The editorial by Nick Thomas argues that higher academic requirements will result in less learning and lower graduation rates. Compare this list to the one about raising the bar. Here are all the word lists to support the reading of Grade 11 Unit 3's texts from SpringBoard's Common Core ELA series: Media in a Democracy, Daily Me, The Newspaper Is Dying, Facebook Photos Sting, Abolish high school football, Facing Consequences, Time to raise the bar, New Michigan Graduation Requirements, Why I Hate Cell Phones, Editorial Cartoons, Let's Hear It for the Cheerleaders, Girl Moved to Tears, In Depth, but Shallowly, Advice to Youth, The War Prayer, Gambling in Schools, How to Poison the Earth