ややこしい
ややこしい · yayakoshii · JLPT N1 · i-adj
complicated
🧶 ややこし = yaya (fussy, tangled) + koshi (hip/waist) — a knot in the string you keep untangling; yaya-koshii is what the knot is
Short for ややこしい: 'yaya' is a fussy, twisting sound, and 'koshii' is an old word for something tangled. Say it fast like a knot you can't undo: yaya-koshii.