a.
1.
Missing, not to be found.
2.
Forfeited, missed.
3.
Misspent, wasted, squandered, dissipated, thrown away.
4.
Bewildered, confused, perplexed, puzzled, distracted.
5.
Abstracted, preoccupied, absent, absentminded, dreamy, napping.
6.
Depraved, corrupt, abandoned, profligate, dissolute, reprobate, graceless, shameless, obdurate, hardened, incorrigible, irreclaimable.
7.
Invisible, imperceptible.
8.
Ruined, destroyed.