* A misspelling: Perhaps you meant a similar-sounding word like "irritate," "irate," or "iterate."
* A specific term: It might be a term within a specific field, language, or culture.
* A made-up word: It could be a fictional term or a word invented for a particular purpose.
To help me understand what you mean, could you please provide more context?
For example:
* Where did you encounter this word?
* What was the context?
* What language is it from?
Knowing more will help me figure out what "iratu" means!