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")
vehement -- (characterized by great force or energy; "vehement deluges of rain"; "vehement clapping"; "a vehement defense")
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