malcontent
malcontent , adjective
[French, from mal ill + content. See Malice, Content.]
discontented; uneasy; dissatisfied; especially, dissatisfied with the government.
The famous malcontent earl of Leicester.
Malcontent , noun
[French malcontent.]
One who discontented; especially, a discontented subject of a government; one who expresses his discontent by words or overt acts. — Spenser