Synonyms of inertia in English:

inertia


See US English definition of inertia

See UK English definition of inertia

See Spanish definition of apatía

noun

1‘he showed signs of lapsing into inertia’

SYNONYMS
inactivity, inaction, inactiveness, inertness, dormancy, passivity, apathy, accidie, malaise, stagnation, dullness, enervation, sluggishness, lethargy, languor, languidness, listlessness, torpor, torpidity, idleness, indolence, laziness, sloth, slothfulness
motionlessness, immobility, lifelessness
archaic fainéance
rare stasis, otiosity, hebetude
ANTONYMS

activity, energy