inert

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in·ert / iˈnərt/ • adj. lacking the ability or strength to move: she lay inert in her bed. ∎  lacking vigor: an inert political system. ∎  chemically inactive.DERIVATIVES: in·ert·ly adv.in·ert·ness n.ORIGIN: mid 17th cent.: from Latin iners, inert- ‘unskilled, inactive,’ from in- (expressing negation) + ars, art- ‘skill, art.’