awfully (adv.)youdaoicibaDictYouDict[awfully 词源字典]
c. 1300, "so as to inspire reverence," from awful + -ly (2). Meaning "dreadfully, so as to strike one with awe" is recorded from late 14c. As a simple intensifier, "very, exceedingly," is attested from c. 1830.[awfully etymology, awfully origin, 英语词源]