different between irreclaimable vs unrepentant

English

ir- +? reclaimable

irreclaimable

Incapable of being reclaimed; not reclaimable.
irreclaimable land
Unredeemable.
an irreclaimable criminal
- 1836, Grantley Berkeley, Berkeley Castle: An Historical Romance (volume 1, page 174)
  Even then, Wingfield endeavoured to retain the hawk by the substitution of another — young Kate, as he called her, a wild, raking bird as ever flew, whose kitish propensities had, some time before, led him to give her up as irreclaimable.

irreclaimable in The Century Dictionary, New York, N.Y.: The Century Co., 1911.
irreclaimable in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.

un- +? repentant

unrepentant (not comparable)

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