étonner

From Middle French estonner, from Old French estoner (“to be dizzy due to a violent blow”), of obscure origin. Possibly from Old Frankish *stunōn (“to make a loud sound”), from Proto-Germanic *stunōną (“to make a sound, groan”), from Proto-Indo-European *(s)ten- (“to thunder, rustle, drone, groan”). Cognate with Old English stunian (“to crash, make a loud sound”) (see stun); or from a hypothetical Latin *extonare (“to thunder out”) from ex (“out”) + tonare (“to thunder”), ultimately from the sam