惯性系

inertial system / inertial frame (mechanics)

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

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

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]

to connect / to relate to / to tie up / to bind / to be (literary)

system / department / faculty

to tie / to fasten / to button up

to connect / to arrest / to worry