strange and troubling; mysterious and unsettling
Describes something eerie, uncanny, or mysteriously disturbing. Rare literary word; not used in everyday speech.
その古い屋敷には幻怪な雰囲気が漂っていた。
A strange and unsettling atmosphere hung over that old mansion.
Compound of 幻 (phantom, illusion) and 怪 (mysterious, strange). The exact historical derivation is uncertain; it is a rare literary coinage.