insigniayoudaoicibaDictYouDict[insignia 词源字典]
insignia: see sign
[insignia etymology, insignia origin, 英语词源]
insignia (n.)youdaoicibaDictYouDict
1640s, from Latin insignia, neuter plural of insigne "badge, mark," from in- "in" (see in- (2)) + signum "mark" (see sign). Singular is insigne.