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Synonyms

unreactive

British  
/ ˌʌnrɪˈæktɪv /

adjective

  1. (of a substance) not readily partaking in chemical reactions

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

A currently unexplained phenomenon is the loss of the unreactive gas xenon from our atmosphere more than 2.5 billion years ago.

From Science Daily • Apr. 24, 2024

In addition to being lighter than air, helium is staunchly unreactive, making it useful for manufacturing sensitive products such as computer chips.

From Science Magazine • Nov. 5, 2023

Nitroglycerin is very dangerous because it explodes easily; neon poses almost no hazard because it is very unreactive.

From Textbooks • Feb. 14, 2019

It is also reasonably cheap, unreactive and easy to purify.

From Economist • Jan. 11, 2018

The checklist for diagnosing death includes checking for a heartbeat and breathing, and examining the eyes to check if the pupils are large and unreactive.

From BBC • Oct. 17, 2012

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.