Meanings
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Thesaurus
Simplified etymology
Cadet comes from Gascon French capdet, literally “little head” and hence “junior,” based on Latin caput, “head.” It was used for a younger son and also gave rise, through its Scottish form caddie, to cad.
Etymology
Borrowed from French cadet, from Gascon capdet, 'captain or younger son,' ultimately from Late Latin capitellum, 'little head.' The family sense referred to a younger son who would not inherit the main estate; because such sons often sought military careers, cadet became the standard term for an officer trainee.