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a. Incapable of moving or acting: "[Some patients] lingered, unable to breathe on their own, inert and unresponsive even to the most noxious stimulus" (Gary Greenberg).
b. Sluggish in action or motion; lethargic. See Synonyms at inactive.
2. Chemistry Not readily reactive with other elements; forming few or no chemical compounds.
3. Having no pharmacologic, metabolic, or other physiological effect.

[Latin iners, inert- : in-, not; see in-1 + ars, skill; see ar- in Indo-European roots.]

in·ert′ly adv.
in·ert′ness n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.inertness - immobility by virtue of being inert
immobility - the quality of not moving


A lack of action or activity:
عَدم حَرَكَه، خُمول، كَسَل، تَراخٍ


(iˈnəːt) adjective
1. without the power to move. A stone is an inert object.
2. (of people) not wanting to move, act or think. lazy, inert people.
iˈnertness noun
iˈnertia (-ʃiə) noun
the state of being inert. It was difficult to overcome the feeling of inertia that the wine and heat had brought on.
References in classic literature ?
It's enough to look at the red hands hanging at the end of those short arms, at those slow, prom- inent brown eyes, to know the inertness of her mind --an inertness that one would think made it ever- lastingly safe from all the surprises of imagina- tion.
FROM the inertness, or what we may term the vegetative character, of his ordinary mood, Clifford would perhaps have been content to spend one day after another, interminably,--or, at least, throughout the summer-time,--in just the kind of life described in the preceding pages.
He was in a manner devoted to it with a sort of inert fanaticism, or perhaps rather with a fanatical inertness.
Rochester; that the impetuous will of the latter held complete sway over the inertness of the former: the few words which had passed between them assured me of this.
Then the air was slowly, very slowly, exhaled, and his body as slowly flattened itself down into inertness.
Objective: Activation and transformation of dinitrogen (n2) into other nitrogen-containing compounds is a challenge for chemists due to the inertness of this molecule.
The inertness means that it can be used in a wide range of coatings and plastics and have excellent weathering properties.
Properties such as corrosion and wear resistance, inertness, durability, cost effectiveness through mass production, recyclability, and easy to clean and sterilize have made stainless steel a suitable material for medical applications.
Graphene with its chemical inertness, thinness, and high transparency makes it very promising as a coating material.
Kaolin has properties such as flat particle shape, brilliant opacity, chemical inertness, non-abrasive texture, etc.
They have exceptional properties, including inertness, purity, chemical and temperature resistance (-200 to +200 C).
Each MS column is tested with a QC mix that includes both acidic and basic probes to ensure inertness across multiple compound classes.