Jamais is this adverb
However, when these 
adverbs are used sarcastically or with a great deal of emotion, they in fact do not
... [DOC] [TLE] French Adverbs of Frequency | Learn French Online [PAR] Mar 30, 2015 ... Adverbs of Frequency in French Jamais : Never, Ever In a sentence: ne...jamais I 
never drink bear: Je ne bois jamais de bire Rarement: rarely, [DOC] [TLE] How to say 'never' in French - French Linguistics [PAR] The equivalent of "never" in French is generally the construction ne...jamais.