Answer:

grudge

AnswerCrossword Clue
GRUDGEIt's unhealthy to hold one
GRUDGEResentment over a prior wrong
GRUDGEFeeling of resentment associated with the last words of the starred answers
GRUDGESustained feeling of resentment
GRUDGEOne may be held and nursed
GRUDGEIll will.
GRUDGEBe unwilling to give
GRUDGEBad thing to bear
GRUDGESoreness?
GRUDGEIt may be held and nursed
GRUDGEIt may be held or nursed
GRUDGEKind of match
GRUDGEFeud fueler