The action or result of cutting away from the underside or lower part of something.

割去某物下部或较低部的行为或结果;切除下部；由下切除的部分。

A notch cut before felling in the base of a tree to determine the direction of falling and prevent splitting.

伐木时在底部所砍之横口(以决定倒落方向及防止裂开)。

To cut away the underpart of.

切除下部；挖去下部。

To sell or work at a lower price than competitors.

【商】削价竞争；索价低于竞争者。

To cut obliquely into a tree below the main cut and on the side toward which the tree will fall.

(伐木时在树倒落之方向)斜砍入主砍口下方。

To undermine or destroy the force, value or effectiveness of.

损减...的力量、价值、效能等；毁坏。