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귀멸 -> 귀신을 멸하다
The hanja for 귀신 (鬼) Is defined as
- spirit/ghost
- soul (dead person’s spirit)
- Dokkaebi
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The hanja for 멸하다 (滅) is defined as
- become put out/extinguished/turned off
- to put out/extinguish/turn off
- to annihilate / completely get rid of
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칼날 -> blade (“The thin sharp part of a knife/sword that cuts things”)
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I skimmed through several scenes and they refer to the “demons” as 도깨비 (Dokkaebi/goblin) so I chose this for my breakdown:
Dokkaebi Terminating Blade
You can see why it’s called “demon slayer” 😅
(I know this is the Korean title, but it’s pretty much the same in Japanese. I am not confident enough with Japanese to break it down like this though)