The Oxford Thesaurus An A-Z Dictionary of Synonyms - abandoned adj.

1) left alone, forlorn, forsaken, deserted, neglected; rejected, shunned, cast off or aside, jilted, dropped, outcast: An abandoned infant was found on the church steps. Totally alone, she felt abandoned by her friends. 2) bad, immoral, amoral, wicked, sinful, evil, corrupt, unprincipled, unrestrained, uninhibited, reprobate; loose, wanton, debauched, wild, dissolute, dissipated, profligate; depraved, lewd, lascivious, flagitious: His abandoned behaviour soon landed him in jail.