Meaning of “inertia” - Learner’s Dictionary

inertia

noun [ U ] uk us /ɪˈnɜːʃə/
NO CHANGE

If there is inertia, a situation remains the same or changes very slowly:

the inertia of larger organizations
LAZY

a failure to do anything, especially because you are too lazy:

International inertia could lead to a major disaster in the war zone.
FORCE

the physical force that keeps something in the same position or moving in the same direction

(Definition of “inertia” from the Cambridge Learner’s Dictionary © Cambridge University Press)