Vehement means intense and forceful attitude in expression or conviction.
Vehement is an adjective.
Synonyms: fierce, passionate, emotional, forceful, ardent, emphatic, fervent, fiery, furious, intense, zealous.
Antonyms: mild, placid, apathetic, feeble, impassive, indifferent, unconcerned.
1. I understood that you are a vehement supporter of our cause.
2. Mr.Ravi vehemently denies having stolen her friends's pocket money.
3. The vehement rain destroyed the entire farm.