seemly (adj.)youdaoicibaDictYouDict[seemly 词源字典]
"of pleasing or good appearance," also "proper, tasteful, decorous," early 13c., semlich, from Old Norse soemiligr "becoming, honorable," from soemr (see seem). Related: Seemliness. Old Norse also had soemleitr "fine to look at."[seemly etymology, seemly origin, 英语词源]