研とぎ師し

noun

knife grinder; sword sharpener; polisher

A person who professionally sharpens blades or polishes items such as swords, mirrors, or knives.

• 祖そ父ふは昔むかし、研とぎ師しとして刀かたなを研といでいた。

  My grandfather used to work as a sword sharpener, polishing swords.

• 包ほう丁ちょうの切きれ味あじが悪わるくなったので、研とぎ師しに頼たのんだ。

  The kitchen knife got dull, so I asked a knife grinder to sharpen it.