jig ‧ saw /ˈdʒɪɡsɔː $ -sɒː/ BrE AmE noun [countable]
1 . ( also ˈjigsaw ˌpuzzle ) a picture cut up into many pieces that you try to fit together
2 . [usually singular] a very complicated situation, especially one that you are trying to understand:
As he explained, another piece of the jigsaw fell into place.
3 .
a tool for cutting out shapes in thin pieces of wood