superbyoudaoicibaDictYouDict
superb: [16] Etymologically, superb denotes being ‘above’. It comes ultimately from Latin super ‘above, over’, which with the addition of the suffix *bh- produced superbus. This had the sense ‘superior’, and it also, from the notion of being ‘above oneself’, of thinking oneself ‘superior’, came to mean ‘proud’. English acquired it via Old French superbe.
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superb (adj.)youdaoicibaDictYouDict
1540s, "noble, magnificent" (of buildings, etc.), from Latin superbus "grand, proud, splendid; haughty, vain, insolent," from super "above, over" (see super-). The second element perhaps is from PIE root *bhe- "to be." General sense of "very fine" developed by 1729. Related: Superbious (c. 1500); superbly.