RESENTFUL
resentful
(adjective) full of or marked by resentment or indignant ill will; “resentful at the way he was treated”; “a sullen resentful attitude”
Source: WordNet® 3.1
Etymology
Adjective
resentful (comparative more resentful, superlative most resentful)
Inclined to resent, who tends to harbor resentment, when wronged.
Synonyms: unforgiving, spiteful
Harboring resentment, full of resentment, at a given moment.
Synonym: bitter
Source: Wiktionary
Re*sent"ful (-fl), a.
Definition: Inclined to resent; easily provoked to anger; irritable.
– Re*sent"ful*ly, adv.
Source: Webster’s Unabridged Dictionary 1913 Edition