noun
Refers to something mysterious, wondrous, or inexplicable. Often used in literary or formal contexts, and commonly appears in compounds like 怪奇 (kaiki, bizarre) or 怪談 (kaidan, ghost story).
その事件は多くの怪を残したまま終わった。
The case ended leaving many mysteries unsolved.
彼の話には怪がある。
There is something strange about his story.