/ ˈviːəmənt; NAmE / adjective
showing very strong feelings, especially anger
SYN forceful :
a vehement denial / attack / protest, etc.
He had been vehement in his opposition to the idea.
► vehe·mence / -məns; NAmE / noun [ U ]
► vehe·ment·ly adverb :
The charge was vehemently denied.
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WORD ORIGIN
late Middle English (describing pain or temperature, in the sense intense, high in degree ): from French véhément or Latin vehement- impetuous, violent, perhaps from an unrecorded adjective meaning deprived of mind, influenced by vehere carry.