diacritic (adj.)youdaoicibaDictYouDict[diacritic 词源字典]
1690s, of sounds, from Greek diakritikos "that separates or distinguishes," from diakrinein "to separate one from another," from dia- (see dia-) + krinein "to separate, decide, judge" (see crisis). As a noun, from 1866. Related: Diacritical.[diacritic etymology, diacritic origin, 英语词源]