Physics term for the tendency of an object to resist changes in motion. Also used metaphorically for resistance to change in habits or systems.
The law of inertia is Newton's first law.
Organizational inertia makes reform difficult.
inertial frame of reference; inertial system
inertial navigation system
inertial guidance
moment of inertia
From 慣 (accustomed, habitual) + 性 (nature, property). A Meiji-era coinage for the Western concept of inertia.