惯性

(physics) inertia / (fig.) force of habit / tendency to do things in the accustomed way / habitual

accustomed to / used to / indulge / to spoil (a child)

nature / character / property / quality / attribute / sexuality / sex / gender / suffix forming adjective from verb / suffix forming noun from adjective, corresponding to -ness or -ity / essence / CL:個|个[ge4]

customary

inertial system / inertial frame (mechanics)