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Insignia refers to a symbol or an emblem or a badge. It does not have an antonym
insignia
symbol, badge, mark
A badge of office, rank, membership, or nationality; an emblem.
Emblem, badge, patch, regalia, ensign.
image, brand, stamp, identification, crest, emblem, insignia
The only difference is a new insignia / badge located next to your rank every time you prestige. In this case there are ten different levels of prestige, each with its own specific badge / insignia.
The Latin equivalent of the English word 'badge' is insigne. In Latin, it's a neuter gender noun. In the plural, the form is 'insignia'.
The word insignia means emblem of military rank, a sign or a token and it comes from the Latin language: IN - towards, SIGNUM - sign. Later it transforms to insignis and then insigne and around the 17th century the word insignia is finalized. Plural can be insignia, as well as insignias.
It means an insignia or an emblem or badge! But if what your asking is the Spanish word "ensena" , it means teach/es!
The winged horse Pegasus, the cap badge is wings eithrer side of a parachute.
The Army Regulation 670-1 on uniforms and insignia does not specify an interpreter badge.