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English Lexicon

Inert

/ɪˈnɜːt/
adjectiveCEFR C1 (Advanced)Top #5400 frequency
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Comprehensive Definitions & Senses

2 senses
As adjective
  1. 1

    Lacking the ability or strength to move; chemically or physically inactive.

    "He lay inert on the grass, completely exhausted after the marathon."
  2. 2

    Unreactive with other chemical elements or compounds under normal conditions.

    "Nitrogen is generally an inert gas used to prevent oxidation in food packaging."
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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

Derived from the Latin word 'iners', meaning 'unskilled, idle, or sluggish', formed from the negative prefix 'in-' (not) plus 'ars' (skill, art). It entered the English language in the mid-17th century initially retaining the sense of sluggishness before expanding into scientific contexts to describe chemically inactive substances.

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