锋利 (fēng lì): sharp (e.g. knife blade); incisive; to the point

This newly bought kitchen knife is very sharp; you hardly need any effort when cutting meat.

Be careful, the edges of the broken glass are very sharp; don't pick it up directly with your hands.

Grandpa sharpened the scissors, and the blade immediately became sharp; cutting paper became much easier.

When surviving in the wild, a sharp dagger can be used to cut branches and prepare food.