lost

adjective

1
not caught with the senses or the mind
words lost in the din
2
unable to function; without help
3
no longer in your possession or control; unable to be found or recovered
a lost child
lost friends
4
spiritually or physically doomed or destroyed
lost souls
a lost generation
5
not gained or won
a lost battle
a lost prize
6
having lost your bearings; confused as to time or place or personal identity
I frequently find myself disoriented when I come up out of the subway
the anesthetic left her completely disoriented
7
perplexed by many conflicting situations or statements; filled with bewilderment
obviously bemused by his questions
bewildered and confused
8
incapable of being recovered or regained
his lost honor
9
deeply absorbed in thought
as distant and bemused as a professor listening to the prattling of his freshman class
lost in thought

Also useful for “lost”:Unscrambler— Turn loose letters into real words