Is UNFIX a Wordle Word?

Yes. UNFIX is a valid Wordle word.

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

What does UNFIX mean?

To unfasten from a fixing.“Whose horrid image doth unfix my hair and make my seated heart knock at my ribs against the use of nature?”
To break again (something previously fixed).“If a problem automatically fixes itself, you probably encountered a problem that will find a way to unfix itself soon.”

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

Starter word rating: WeakIn the top 94% of all valid Wordle words for testing common letters.
Vowels: U, I
Unique letters: 5 of 5
Common letters: I
Rare letters: X

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.