noun, na-adjective
complex and mysterious; complicated and inscrutable
Describes something that is not only intricate but also baffling or eerie in its complexity. Often used for situations, mechanisms, or plots that defy easy understanding.
この事件の背景には複雑奇怪な事情が絡んでいる。
Complex and mysterious circumstances are intertwined behind this case.
彼の説明は複雑奇怪で、誰も理解できなかった。
His explanation was so complicated and inscrutable that no one could understand it.
Compound of 複雑 (complex) and 奇怪 (mysterious/bizarre). The exact historical derivation is uncertain, but the word is a straightforward combination of these two Sino-Japanese elements.