noun
hacksaw; bow saw
A saw with a thin blade held in tension by a bow-shaped frame, used for cutting metal or wood.
パイプを切るのに弓のこを使った。
I used a hacksaw to cut the pipe.
弓のこの刃が折れたので交換しなければならない。
The hacksaw blade broke, so I have to replace it.
General term for a saw; 弓のこ specifically refers to a bow-shaped frame saw.
Compound of 弓 (yumi, 'bow') and 鋸 (noko, 'saw'), referring to the bow-shaped frame that tensions the blade.