불가사의해요 · 불가사의했어요 · 불가사의한 (+noun)
mysterious, inexplicable, wondrous
Example
그 사건은 지금까지도 불가사의하게 남아 있어요.
That incident remains a mystery even now.
Word parts
불 not+가 can+사 think+의 discuss
Literally 'cannot be thought or discussed' — originally a Buddhist term.
Good to know
세계 7대 불가사의 means 'the Seven Wonders of the World'.
Related words