ENNUI Meaning of ENNUI in English [ ɒn'wi: ]■ noun listlessness and dissatisfaction arising from boredom.OriginC18: Fr., from L. in odio(n-) , from mihi in odio est 'it is hateful to me'; cf. annoy . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004