astonish (v.)youdaoicibaDictYouDict
c. 1300, astonien, from Old French estoner "to stun, daze, deafen, astound," from Vulgar Latin *extonare, from Latin ex- "out" + tonare "to thunder" (see thunder); so, literally "to leave someone thunderstruck." The modern form (influenced by English verbs in -ish, such as distinguish, diminish) is attested from c. 1530.
No wonder is thogh that she were astoned [Chaucer, "Clerk's Tale"]
Related: Astonished; astonishing; astonishingly.
wonder (n.)youdaoicibaDictYouDict
Old English wundor "marvelous thing, miracle, object of astonishment," from Proto-Germanic *wundran (cognates: Old Saxon wundar, Middle Dutch, Dutch wonder, Old High German wuntar, German wunder, Old Norse undr), of unknown origin. In Middle English it also came to mean the emotion associated with such a sight (late 13c.). To be no wonder was in Old English. The original wonder drug (1939) was Sulfanilamide.