inert B2 Topic:Describing People US /ɪnˈɝt/ UK /ɪnˈɜːt/ See IPA manual Freq #31107 Meanings 1 adj Not moving or not able to move. He lay inert on the sofa, too tired to get up. 2 adj Slow, lazy, or lacking energy. The summer heat left the whole town feeling inert. 3 adj Not reacting chemically with other substances. Helium is an inert gas that does not burn. Thesaurus Synonyms 1 adj · not moving or not able to... motionlessimmobilestill 2 adj · slow, lazy, or lacking energy. sluggishtorpid 3 adj · not reacting chemically... unreactive Word family Forms inertness Derived forms anti-inert-neutrinobioinertinertitudeinertlyinertnessmucoinertnoninertpractico-inert Related forms inertia Common collocations inert gas Adjective + noun Etymology AI details From French inerte, from Latin iners (“inactive, inert”). *h₂er- Proto-Indo-European View etymology graph -> Topics Describing People External links Cambridge Dictionary Wiktionary Google Images # inert **Type:** Word **Level:** B2 **Part of speech:** adj **IPA (US):** /ɪnˈɝt/ **IPA (UK):** /ɪnˈɜːt/ **Frequency rank:** 31107 ## Meanings 1. Not moving or not able to move. 2. Slow, lazy, or lacking energy. 3. Not reacting chemically with other substances. ## Examples - He lay inert on the sofa, too tired to get up. - The summer heat left the whole town feeling inert. - Helium is an inert gas that does not burn. ## Derived Forms - anti-inert-neutrino - bioinert - inertitude - inertly - inertness - mucoinert - noninert - practico-inert ## Related Forms - inertia ## Roots and Affixes - Root: *h₂er- ## Etymology From French inerte, from Latin iners (“inactive, inert”). ## AI Etymology Inert comes from French inerte, from Latin iners (“inactive, inert”). The historical line also includes *h₂er-. ## Topics - Describing People markdown