Is MIVVY a Wordle Word?

Yes. MIVVY is a valid Wordle word.

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

What does MIVVY mean?

/ˈmɪ.vi/

A landlady; a woman who is the owner or manager of a guesthouse.
An (old) woman.“Yah booh! Chuck ’em here, you old mivvy. I’ll cop ’em.”
A skillful, smart, adept person.“" 'E does all the plannin' an' that, y'know," said Marketer, awkwardly. " He's a mivvy at makin' things easy."”

1 more noun definition

A marble.“You certainly would have laughed to see others playing at marbles, for the “mivvies” were like footballs, […]”

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

Starter word rating: WeakIn the top 99% of all valid Wordle words for testing common letters.
Vowels: I
Unique letters: 4 of 5Repeats V
Common letters: I

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.