having been deserted or left

an abandoned car

abandoned pets

unrestrained; uninhibited

a wild, abandoned dance

cease to support or look after (someone); desert

her natural mother had abandoned her at an early age

give up completely (a practice or a course of action)

he had clearly abandoned all pretence of trying to succeed

negotiations were abandoned and fighting intensified

allow oneself to indulge in (a desire or impulse)

they abandoned themselves to despair