Is WILJA a Wordle Word?

Yes. WILJA is a valid Wordle word.

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

What does WILJA mean?

Alternative spelling of wiltja: A semicircular Aboriginal dwelling, intended as a temporary shelter from the heat of the sun.

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

Starter word rating: WeakIn the top 72% of all valid Wordle words for testing common letters.
Vowels: I, A
Unique letters: 5 of 5
Common letters: I, L, A
Rare letters: J

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.