Insignia
来自Big Physics
mid 17th century: from Latin, plural of insigne ‘sign, badge of office’, neuter of insignis ‘distinguished (as if by a mark)’, from in- ‘towards’ + signum ‘sign’.
wiktionary
From Latin īnsīgnia, nominative plural of īnsīgne(“emblem, token, symbol”). Doublet of ensign.
etymonline
insignia (n.)
1640s, from Latin insignia, neuter plural of insigne "badge of honor or office, mark, proof, sign, token," from in- "in" (from PIE root *en "in") + signum "identifying mark, sign" (see sign (n.)). The classically correct singular is insigne.
