General "lost"
* χαμένος (chamenos) - This is the most common word for "lost" and can refer to being lost in a physical sense (e.g., lost in the woods), lost in thought, or lost in time.
* αγνοούμενος (agnooumenos) - This means "missing" or "unknown" and can be used to describe something that is lost and cannot be found.
Other specific meanings:
* εξαφανισμένος (exafanismos) - This means "disappeared" or "vanished" and can be used to describe something that is lost and presumed gone forever.
* απολεσμένος (apolemenos) - This means "destroyed" or "ruined" and can be used to describe something that is lost and cannot be recovered.
* διαστροφή (diastrofi) - This means "distortion" or "perversion" and can be used to describe something that is lost in meaning or purpose.
The best word to use will depend on the specific context of what you are trying to say.