13. lost insensible to: lost to all sense of duty.
Definition of 'LOST'
Princeton's WordNet
1. (adj)doomed, lost people who are destined to die soon "the agony of the doomed was in his voice"
2. (adj)lost no longer in your possession or control; unable to be found or recovered "a lost child"; "lost friends"; "his lost book"; "lost opportunities"
3. (adj)confused, disoriented, lost having lost your bearings; confused as to time or place or personalidentity "I frequently find myself disoriented when I come up out of the subway"; "the anesthetic left her completely disoriented"
4. (adj)lost spiritually or physically doomed or destroyed "lost souls"; "a lost generation"; "a lost ship"; "the lost platoon"
5. (adj)lost not gained or won "a lost battle"; "a lost prize"
6. (adj)lost incapable of being recovered or regained "his lost honor"
7. (adj)lost, missed not caught with the senses or the mind "words lost in the din"
8. (adj)bemused, deep in thought(p), lost(p), preoccupied deeply absorbed in thought "as distant and bemused as a professor listening to the prattling of his freshman class"; "lost in thought"; "a preoccupied frown"
9. (adj)baffled, befuddled, bemused, bewildered, confounded, confused, lost, mazed, mixed-up, at sea perplexed by many conflicting situations or statements; filled with bewilderment "obviously bemused by his questions"; "bewildered and confused"; "a cloudy and confounded philosopher"; "just a mixed-up kid"; "she felt lost on the first day of school"
10. (adj)helpless, lost unable to function; without help
5. lost a lost cause sth that will not succeed He advised his client to stop giving money to lost causes.
6. lost lost for words unsure what to say For once, he was lost for words.
7. lost lost on sb not understood by sb The irony was lost on her.
8. lost make up for lost time to do sth a lot because you have never done it or have not done it for a long time Jackson regrets not writing for the past two years, but is ready to make up for lost time this year.