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Free online dictionnary including 65 430 words and 155 000 examples
happening unexpectedly, unforeseen, unexpected, unhoped or unlooked for; extraordinary, fortuitous, casual, accidental; unawares, suddenly; by chance, fortuitously.
qui se rencontre à l'improviste, inattendu, inopiné, imprévu, inespéré, fortuit, accidentel.