Etymology

kaiju

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Today it means: A fictional giant monster, particularly of the kind found in Japanese science fiction films and other media, like Godzilla, King Kong or Gamera. Full definition →

Japanese 怪獣
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The story

  1. Japanese · borrowed from怪獣
  2. English todaykaiju

From Japanese 怪獣 (かいじゅう, kaijū), from Middle Chinese 怪 (kweajᴴ, “strange, fantastic”) + 獸 (syuwᴴ, “beast”) (compare Mandarin 怪獸 /怪兽 (guàishòu)).

Etymology from Wiktionary, CC BY-SA 4.0.