unapparent

This term describes a state of invisibility or obscurity that is often temporary or subject to discovery. It suggests a gap between the actual existence of a fact and the ability of an observer to perceive it, creating a sense of mystery or a puzzle that requires investigation to solve.

While similar to "hidden," this word carries a more clinical or analytical tone, frequently appearing in technical, legal, or diagnostic contexts where a cause or symptom is not immediately evident upon first inspection. It differs from "invisible" in that the object is physically present but simply not recognized or noticed.