French Etymology From étonnant + -ment. Pronunciation IPA(key): /e.tɔ.na.mɑ̃/ Audio (Paris):(file) Adverb étonnamment surprisingly (in a way that causes surprise because it is unexpected, or unusual) Further reading “étonnamment”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.Wikiwand - on Seamless Wikipedia browsing. On steroids.