* Misspelling: There could be a similar-sounding word you're thinking of.
* Regional Term: It might be a word used in a specific region or dialect.
* Made-up Word: Perhaps it's a fictional word from a book, game, or other creative work.
To help me understand what you're looking for, please provide more context.
For example, tell me:
* Where did you hear this word?
* What is the subject matter?
* What language do you think it might be from?
With more information, I can try to help you find the meaning of "wassilika."