I .
/ ˌʌnˈjuːzd; NAmE / adjective
not being used at the moment; never having been used
—compare disused
II .
/ ʌnˈjuːst; NAmE / adjective
unused to sth / to doing sth not having much experience of sth and therefore not knowing how to deal with it; not used to sth :
This is an easy routine, designed for anyone who is unused to exercise.
She was unused to talking about herself.
OPP used