na-adjective
Used as an adjectival noun (na-adjective) to describe something that cannot be seen. Often appears in technical, sci-fi, or metaphorical contexts.
SF映画では、インビジブルな敵がよく登場する。
In sci-fi movies, invisible enemies often appear.
その問題の原因はインビジブルな
The cause of the problem was an invisible factor.