Etymology

kaijin

K5A1I1J8I1N1

Today it means: A fictional humanoid monster as a typical antagonist in tokusatsu media. Full definition →

Japanese 怪人
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The story

  1. Japanese · borrowed from怪人
  2. English todaykaijin

From Japanese 怪人 (かいじん, kaijin), from Middle Chinese 怪 (kweajᴴ, “strange, fantastic”) + 人 (nyin, “person”)

Etymology from Wiktionary, CC BY-SA 4.0.