打うち欠かく

godan verb (-ku), transitive verb

break off; knock off

Used for breaking or knocking a piece off something by striking it. Often implies a forceful, chipping action.

• 石いしを打うち欠かいて形かたちを整ととのえる。

  Break off pieces of stone to shape it.

• 彼かれはハンマーで壁かべの角かどを打うち欠かいた。

  He knocked off the corner of the wall with a hammer.

godan verb (-ku), transitive verb

create a false eye by sacrificing a stone (go)

Technical go term: to intentionally sacrifice a stone to make a false eye, disrupting the opponent's shape.

• 相あい手ての眼めを打うち欠かいて、生いきを奪うばう手て筋すじだ。

  It's a technique to create a false eye by sacrificing a stone and take away the opponent's life.