liner, lining, inside liner; understudy, actor's subsitute, stunt-double

inside, inner (matters of the heart, the inside, as opposed to outward appearances)

inside, inner; pertaining to inner things (as opposed to outward appearances)

liner, lining, inside liner; understudy, actor's subsitute, stunt-double

internal, interior, inside

to enter, save, record, register

to enter, go in; to be included; to be enrolled

to go in, to enter, to take refuge