vehement
Concise Oxford English Dictionary © 2008 Oxford University Press:
vehement /ˈviːɪm(ə)nt/
▶adjective showing strong feeling; forceful, passionate, or intense.
– derivatives
vehemence noun,
vehemently adverb.
vehemence noun,
vehemently adverb.
– origin ME (describing intense pain or high temperature): from Fr. véhément or L. vehement- ‘impetuous, violent’, perh. from an unrecorded adjective meaning ‘deprived of mind’, influenced by vehere ‘carry’.
'vehement' also found in these Oxford entries:

