Is TEUGH a Wordle Word?

Yes. TEUGH is a valid Wordle word.

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

What does TEUGH mean?

Tough, stubborn“Teugh, adj. (Pr. of the eu much as in Teuflt). Tough. "With cordes enewe and ropys Teugh The Jues felle my limmes out-droghe For that I was not mete enoghe Unto the bore"”

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

Starter word rating: WeakIn the top 43% of all valid Wordle words for testing common letters.
Vowels: E, U
Unique letters: 5 of 5
Common letters: T, 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.