What's the difference between firk and mirk?

Firk

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Definition:

• (v. t.) To beat; to strike; to chastise.
• (v. i.) To fly out; to turn out; to go off.
• (n.) A freak; trick; quirk.

Example Sentences:

Mirk

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Definition:

• (a.) Dark; gloomy; murky.
• (n.) Darkness; gloom; murk.

Example Sentences: