noun
Refers to the tool used for splitting wood, typically a hatchet or small axe.
彼は薪割りで太い丸太を割った。
He split the thick log with a hatchet.
noun, noun or participle which takes 'suru'
wood-chopping
The activity of chopping or splitting wood, often for firewood. Can be used as a suru-verb.
冬に備えて薪割りをする。
I chop wood in preparation for winter.
週末はキャンプ場で薪割りを手伝った。
I helped with wood-splitting at the campsite over the weekend.