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Definition of inert:

  1. Destitute of the power of moving itself, or of active resistance to motion; as, matter is inert.
  2. Indisposed to move or act; very slow to act; sluggish; dull; inactive; indolent; lifeless.
  3. Not having or manifesting active properties; not affecting other substances when brought in contact with them; powerless for an expected or desired effect.


indolent, sulky, unoccupied, undisturbed, fallow, anaerobic, quaggy, mucky, impassive, immaterial, achromatic, marshy, inoperative, chemical, soggy, tedious, mind-numbing, deaf, sleepy, active, unbiassed, concentrated, lazy, controlled, unemployed, anaerobic, muddy, swampy, vacant, impersonal, inactive, unmoving, unused, torpid, corrosive, chemical equation, aerobic, doughy, alkaloid, boggy, slow, stiff, unbiased, humdrum, undemonstrative, so-so, unreactive, slothful, nonmoving, dreary, unemotional, uninspired, electroneutral, action, miry, hibernating, squashy, uninteresting, quiescent, blank, emotionless, sluggish, sloughy, restrained, catalytic, waterlogged, unexciting, indifferent, unresponsive, latent, trifling, at rest, dull, sloppy, off, boring, free, trivial, neutral, alkaline.

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