knife-edge

Mane (Îngilîzî)

1. A piece of steel sharpened to an acute edge or angle, and resting on a smooth surface, serving as the axis of motion of a pendulum, scale beam, or other piece required to oscillate with the least possible friction.
2. A precarious balance that could be upset by a very small force in either direction.
3. Used other than figuratively or idiomatically: the edge of a knife.

Hevwate

cutting edge

cutting point

edge of a knife

edge of tool

Werger

messerscharf

gume