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Definition of inert

inert

/ɪˈnɝːt/
in · ert
Adverb:inertly
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inert Lexical Profile

inert Game Scores & Validity

• adjective

1

Chemically inactive; lacking the capacity to react readily with other elements or compounds.

Example

"Helium and argon are inert gases commonly used in industrial welding to prevent unwanted oxidation."

2

Lacking the ability or strength to move; completely motionless or inanimate.

Example

"The exhausted hiker lay inert on the cabin floor for several minutes before catching his breath."

3

Lacking vigor, energy, or the willingness to act; sluggish or passive.

Example

"Critics accused the oversight committee of remaining inert while the financial crisis unfolded."

Synonyms
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Antonyms
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• Rhymes for inert

• Nearby Words

inequality
inequitable
inequity
inert
inertia
inertly
inertness

Word Origin & Etymology

Borrowed in the mid-17th century from Latin iners (genitive inertis), originally meaning 'unskilled' or 'idle', formed from the privative prefix in- ('not') and ars ('skill' or 'art').

Cite this Entry

Wordmom. (2026). Definition of Inert. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/inert
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