Other forms: jigsaws
A jigsaw is a power saw whose blade jumps up and down for curved cuts. Use a jigsaw, a cordless jigsaw, cut it with the jigsaw.
The blade cuts on the upstroke, which is why the good face of the board should go downwards to keep the tearing out of sight. The puzzle takes its name from the tool, because the first ones were cut on a saw of this kind.
1nounjigsawA power saw with a blade that moves up and down.
“He used a jigsaw to cut a curved shape out of the wooden board.”
jigsaw is a tool.
Jig plus saw. The puzzle is named after the tool, since the first ones were cut with it.
From jig + saw.
Etymology from Wiktionary, CC BY-SA