研とぎ澄すます

godan verb (-su), transitive verb

sharpen; hone; make keen

Used both literally for blades and figuratively for senses, skills, or intuition. Often implies refining to a high degree of sharpness or sensitivity.

• 包ほう丁ちょうを研とぎ澄すましてから料りょう理りを始はじめる。

  I start cooking after sharpening the kitchen knife.

• 彼かれは長なが年ねんの修しゅ行ぎょうで感かん覚かくを研とぎ澄すました。

  He honed his senses through years of training.