abattoir

Borrowed from French abattoir, itself built from the verb abattre, meaning "to slaughter," plus the suffix -oir, meaning "place for."

The facts available don't show a shift in meaning — the word has named a slaughterhouse from its French coinage into English use.

It's a cognate of English abate, since both abattoir and abate trace back to the same root verb, abattre.