Synonyms of inertia

inertia

noun

i-ˈnər-shə 

as in laziness

an inclination not to do work or engage in activities

the inertia that grips so many of the club's members is the reason why nothing ever gets done

Synonyms & Similar Words

• laziness
• idleness
• indolence
• sloth
• shiftlessness
• loafing
• lethargy
• apathy
• sluggishness
• lassitude
• supineness
• languor
• lounging
• listlessness
• lolling
• dallying
• goldbricking

Antonyms & Near Antonyms

• industry
• drive
• initiative
• industriousness
• ambition
• enterprise
• hustle
• energy
• perseverance
• diligence
• go
• vigor
• vitality
• exuberance
• assiduity
• animation
• robustness
• vivacity
• liveliness
• pep
• sprightliness
• briskness
• vibrancy
• assiduousness
• vim
• lustiness
• peppiness
• jazziness

Example Sentences

Recent Examples of inertia

Ships have real inertia and Newtonian physics, and pilots can choose to toggle flight assistance on to help stabilize their often unpredictable craft, or off to perform mind-bending maneuvers that can be the edge between life and death in high-skill player versus player shootouts. —Alan Bradley, Space.com, 31 Jan. 2026

Bruening believes the market for specific skate types is just too small, the cost of development and rollout too high, and the cultural inertia too strong for some changes. —Mark Hay, Popular Science, 28 Jan. 2026

Without deliberate pruning, internal systems become a form of organizational inertia. —Abdo Riani, Forbes.com, 26 Jan. 2026

When she is summoned back to her hometown to settle the death of an absent father, what should be a brief administrative detour unravels into unresolved debts, institutional inertia, and a decaying body caught in bureaucratic limbo. —Leo Barraclough, Variety, 15 Jan. 2026