verb

Cease to support or look after (someone); desert.

her natural mother had abandoned her at an early age

desert,leave,leave high and dry,turn one’s back on,cast aside,break with,break up with

noun

Complete lack of inhibition or restraint.

she sings and sways with total abandon

uninhibitedness,recklessness,lack of restraint,lack of inhibition,unruliness,wildness,impulsiveness,impetuosity,immoderation,wantonness