A tool for shaving hair, typically referring to an electric shaver or a razor. The word is straightforward and neutral.
I bought a new shaver.
I shave my beard with a razor.
Compound of 毛 (ke, 'hair') and 剃り (sori, 'shaving'), from the verb 剃る (soru, 'to shave'). The reading けぞり is a straightforward combination.