Is NIGRE a Wordle Word?

Yes. NIGRE is a valid Wordle word.

It is not on the Wordle answer list, so it is unlikely to be a daily answer.

What does NIGRE mean?

In soapmaking, the lower layer of liquid produced by pitching, which contains most of the impurities.

Definition from Wiktionary, available under the CC BY-SA license.

Starter word rating: AverageIn the top 11% of all valid Wordle words for testing common letters.
Vowels: I, E
Unique letters: 5 of 5
Common letters: I, R, E

Letter ratings use how often each letter appears in Wordle answers.

Tap its tiles to the colours Wordle showed, and the Wordle Solver lists every word that still fits, with the best next guess.