adj. showing or caused by strong feeling; forceful, ardent (a vehement protest; vehement desire).
Derivatives:
vehemence n. vehemently adv.
Etymology: ME f. F v{eacute}h{eacute}ment or L vehemens -entis, perh. f. vemens (unrecorded) deprived of mind, assoc. with vehere carry