VERBS be, feel, look, seem, sound | become, grow They grew bitter and resentful. | remain
ADV. bitterly, deeply, extremely, very They were bitterly resentful of the fact that they had to work such long hours. | increasingly | almost She looked at him, almost resentful now. | a little, slightly, vaguely | secretly
PREP. about/at She felt resentful at the way she had been treated. | of He was very resentful of their success. | towards He felt deeply resentful towards his ex-wife.