[1830–40; ‹ F, equiv. to claqueclaque + -eur-eur]This word is first recorded in the period 1830–40. Other words that entered Englishat around the same time include: isomerism, isometric, nationalism, paraffin, stroboscope-eur is a suffix occurring in loanwords from French, usually agent nouns formed from verbs(entrepreneur; voyeur), less commonly adjectives (agent provocateur)