Revenge, unambiguously. A heavy thing to make permanent.

What a Japanese person actually thinks
Dark and slightly alarming. Where English 'vengeance' can sound operatic, Japanese 復讐 sounds like a court case. Readers may find it genuinely unsettling rather than cool.

Meaning

Literally: return + enmity
Actually: Revenge, vengeance. Not the poetic kind — this is the word in crime reporting.

Scores

Naturalness●●●●●

Common word.

Coolness●●●●●

讐 is a striking, rarely-seen character. The sentiment is what people will react to.

Watch out

mediumThis states an intention rather than a value. Worth being sure you want to still mean it in twenty years.

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臥薪嘗胆 gashin shōtan
enduring hardship to achieve a long-held aim

A classical idiom — literally 'sleeping on firewood, tasting gall' — about patiently bearing suffering to one day settle a score. Everything 復讐 means, with dignity and a story behind it.

On skin

復讐

Orientation: vertical

Mincho.