noun
knife grinder; sword sharpener; polisher; grindery
Refers to a person who sharpens knives, swords, or polishes mirrors and blades professionally, or the shop where such work is done.
包丁が切れなくなったので、研ぎ屋に持って行った。
My kitchen knife got dull, so I took it to the knife grinder.
祖父は若い頃、刀の研ぎ屋として働いていた。
My grandfather worked as a sword sharpener when he was young.
The verb meaning 'to sharpen' or 'to polish'; 研ぎ屋 is the person or shop that performs this action.
Compound of 研ぎ (togi, the continuative form of 研ぐ 'to sharpen, polish') and 屋 (ya, 'shop' or 'person who does something').