- fierce, tearing, vehement, violent, trigger-happy - marked by extreme intensity of emotions or convictions; inclined to react violently; fervid; "fierce loyalty"; "in a tearing rage"; "vehement dislike"; "violent passions"
Antonym: mild (indirect, via intense)
- vehement - characterized by great force or energy; "vehement deluges of rain"; "vehement clapping"; "a vehement defense"
Antonym: weak (indirect, via strong)