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モヤモヤ moyamoya
Fog in the chest that won't clear.
What does moyamoya mean?
The feeling left when something is technically resolved and still sits wrong. No target, no argument, just haze — and no English word does the job in one go.
Example
話し合ったけど、まだモヤモヤする。
We talked it out, and I still feel unsettled.
Vibe
Who you can say this to, and how it lands.
Safe to use Fine in ordinary conversation.
The story behind moyamoya
The root is 靄, the mist that hangs low over a valley and refuses to lift. Doubling it moves the weather inside the ribcage, which is a very Japanese piece of engineering: a physical image handed to an emotion that has no clean name.
What it is good at is the aftermath. The apology was made, the meeting ended, the friend explained themselves, and something is still not sitting flat. There is now even a verb, モヤる, for the moment it starts. The word's opposite is スッキリ, the clearing, and speakers use the pair as a matched set: you carry the fog around until something finally lets the air through.