unreclaimable
/(ˌ)ʌnrɪˈkleɪməbl/adjective
1Not capable of being restored to a good spiritual or moral state, or reformed from a life of vice or undesirable behaviour; irredeemable; (also in weaker, more general use) not able to change; incorrigible. Now somewhat archaic.
2Of land: that cannot brought under cultivation or made fit for habitation; uncultivable.
3That cannot be regained, retrieved, or recovered.
noun
With the. Unreclaimable people as a class.
Origin
Late 16th century; earliest use found in Arthur Golding (d. 1606), translator. From un- + reclaim + -able.