unthank verb 2noun 1forms 3 verb2 •To recant; unsay, as what has been said by way of acknowledgement. •To undo or retract one's thankfulness; negate, cancel, or revoke one's thanks. noun1 •Lack or absence of thanks or thankfulness; thanklessness; unthankfulness; ill-will.It is always by this unthank that things are given to the observer that we pretend to have access to the truth of the word. — 2000 formsunthanked · unthanking · unthanks