磨みがき込こむ

godan verb (-mu), transitive verb

polish thoroughly; rub to a shine

Implies careful, repeated polishing until a deep luster is achieved. Often used for shoes, metal, or surfaces.

• 彼かれは毎まい朝あさ、靴くつを磨みがき込こんでから出でかける。

  He polishes his shoes thoroughly every morning before going out.

• 職しょく人にんが包ほう丁ちょうを磨みがき込こむと、刃はが鏡かがみのように光ひかった。

  When the craftsman polished the knife thoroughly, the blade shone like a mirror.