Answer: repiner

AnswerCrossword Clue
REPINERComplaining person
REPINEROne who complains
REPINERComplainer.
REPINERFretful one
REPINERLydia Languish, e.g.
REPINERDiscontented one
REPINERGrumbler
repinerto yearn
repinerto complain
repinerone who repines (to express discontent)