utterly (adv.)youdaoicibaDictYouDict[utterly 词源字典]
early 13c., "truly, plainly, outspokenly," from utter (v.) + -ly (1); meaning "to an absolute degree" is late 14c., from utter (adj.)). Cf similarly formed German äusserlich. Old English uterlic (adj.) meant "external."[utterly etymology, utterly origin, 英语词源]