Definition of unthank:
(n) :
Lack or absence of thanks or thankfulness; thanklessness; unthankfulness; ill-will.
(v) :
(transitive) To undo or retract one's thankfulness; negate, cancel, or revoke one's thanks.
(v) :
(transitive) To recant; unsay, as what has been said by way of acknowledgement.
(n) :
A surname.
(n) :
A number of places in England:
(n) :
A hamlet in Dalston parish, Cumberland, Cumbria, previously in Carlisle district (OS grid ref NY3948).