vehement

adj. fervent, impassioned; intense, strong

Adjective
1. marked by extreme intensity of emotions or convictions; inclined to react violently; fervid; "fierce loyalty"; "in a tearing rage"; "vehement dislike"; "violent passions"
(synonym) fierce, tearing, violent, trigger-happy
(similar) intense
2. characterized by great force or energy; "vehement deluges of rain"; "vehement clapping"; "a vehement defense"
(similar) strong

adj. vehement, passionate, intense

(a.)
Very ardent; very eager or urgent; very fervent; passionate; as, a vehement affection or passion.
  

(a.)
Acting with great force; furious; violent; impetuous; forcible; mighty; as, vehement wind; a vehement torrent; a vehement fire or heat.
  

vehement
violent
passionate
bitter
impetuous
vehemently
passionately
bitterly