Synonyms of the word

inert

• 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. (chemistry) A substance that does not react chemically.

inactive

• adj. Not active, temporarily or permanently.
• adj. Not functioning or operating; broken down.
• adj. Retired from duty or service.
• adj. (chemistry) Relatively inert.
• adj. (physics) Showing no optical activity in polarized light.

indifferent

• adj. Not caring or concerned; uninterested, apathetic.
• adj. Mediocre, usually used negatively in modern usage.
• adj. Having no preference or bias, being impartial.
• adj. Not making a difference; without significance or importance.
• adj. (mechanics) Being in the state of neutral equilibrium.
• adv. (obsolete) To some extent, in some degree (intermediate between very and not at all); moderately, tolerably,…

neutral

• adj. Not taking sides in a conflict such as war; nonaligned.
• adj. Favouring neither the supporting nor opposing viewpoint of a topic of debate; unbiased.
• adj. (grammar) Neither positive nor negative.
• adj. Neither beneficial nor harmful.
• adj. (biology) Having no sex; neuter.
• adj. Having no obvious colour; gray.
• adj. (physics) Neither positive nor negative; possessing no charge or equivalent positive and negative charge…
• adj. (chemistry) Having a pH near 7, neither acidic nor alkaline.
• n. A nonaligned state, or a member of such a state.
• n. A person who takes no side in a dispute.
• n. An individual or entity serving as an arbitrator or adjudicator (jargon / legal).
• n. A neutral hue.
• n. The position of a set of gears in which power cannot be transmitted to the drive mechanism.
• n. An electrical terminal or conductor which has zero or close to zero voltage with respect to the ground.

nonmoving

• adj. Not moving; stationary; inert.

sluggish

• adj. Habitually idle and lazy; slothful; dull; inactive.
• adj. Slow; having little motion.
• adj. Having no power to move oneself or itself; inert.
• adj. Characteristic of a sluggard; dull; stupid; tame; simple.
• adj. Exhibiting economic decline, inactivity, slow or subnormal growth.

soggy

• adj. Soaked with moisture or other liquid.

torpid

• adj. unmoving.
• adj. dormant or hibernating.
• adj. lazy, lethargic or apathetic.
• n. (Britain, Oxford University slang) An inferior racing boat, or one who rows in such a boat.

unmoving

• adj. Not moving; still.
• adj. Not moving or rousing; failing to inspire the emotions.

unreactive

• adj. (chemistry) Not reactive; relatively inert.
• adj. (psychology) That does not respond to a stimulation.