inactive

[ in-ak-tiv ]
/ ɪnˈæk tɪv /

adjective

not active: an inactive volcano.
sedentary or passive: an inactive life.
sluggish; indolent.
Military. not on active duty.
Chemistry.
  1. inert; unreactive.
  2. noting a compound that has no effect on polarized light.

Origin of inactive

First recorded in 1715–25; in-3 + active

OTHER WORDS FROM inactive

in·ac·tive·ly, adverbin·ac·tiv·i·ty, in·ac·tive·ness, noun

synonym study for inactive

1, 2. Inactive, dormant, inert, sluggish, torpid suggest lack of activity. Inactive indicates absence of action, indisposition to activity, or cessation of activity: an inactive compound, life, file of papers. Dormant suggests the quiescence or inactivity of that which sleeps but may be roused to action: a dormant volcano. Inert suggests the condition of dead matter, with no inherent power of motion or action; it may also mean unable to move, or heavy and hard to move: an inert mass; inert from hunger. Sluggish expresses slowness of natural activity or of that which does not move readily or vigorously: a sluggish stream, brain. Torpid suggests a state of suspended physical powers, a condition particularly of animals that hibernate: Snakes are torpid in cold weather.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for inactivity

British Dictionary definitions for inactivity

inactive
/ (ɪnˈæktɪv) /

adjective

idle or inert; not active
sluggish, passive, or indolent
military of or relating to persons or equipment not in active service
chem (of a substance) having little or no reactivity
(of an element, isotope, etc) having little or no radioactivity

Derived forms of inactive

inactively, adverbinactivity or inactiveness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012