from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Unable to move or act.
- adj. Sluggish in action or motion; lethargic. See Synonyms at inactive.
- adj. Chemistry Not readily reactive with other elements; forming few or no chemical compounds.
- adj. Having no pharmacologic or therapeutic action.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Unable to move or act; inanimate.
- adj. Sluggish or lethargic.
- adj. In chemistry, not readily reacting with other elements or compounds.
- adj. Having no therapeutic action.
- n. A substance that does not react chemically.
from the GNU version of the Collaborative International Dictionary of English
- adj. Destitute of the power of moving itself, or of active resistance to motion.
- adj. Indisposed to move or act; very slow to act; sluggish; dull; inactive; indolent; lifeless.
- adj. Not having or manifesting active properties; not affecting other substances when brought in contact with them; powerless for an expected or desired effect.
from The Century Dictionary and Cyclopedia
- Having no inherent power of action, motion, or resistance; without inherent force; inanimate; lifeless: applied to matter in its intrinsic character: as, an inert mass of clay; an inert corpse.
- Indisposed or unable to move or act; inactive; sluggish: as, an inert drug.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. slow and apathetic
- adj. unable to move or resist motion
- adj. having only a limited ability to react chemically; chemically inactive
Latin iners, inert- : in-, not; see in-1 + ars, skill; see ar- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From French inerte, from Latin iners ("inactive, inert"). (Wiktionary)