also: ジグソー・パズル · ジグゾーパズル
jigsaw puzzle
Refers to the physical puzzle made of interlocking pieces, or metaphorically to a complex situation that needs piecing together.
I finished a 1000-piece jigsaw puzzle over the weekend.
This case is just like a jigsaw puzzle.
I assembled a 1000-piece jigsaw puzzle over the weekend.
It took half a year, but I finally finished the jigsaw puzzle.
There's one jigsaw puzzle piece missing.