adjective / adverb
sharp
SHARP/ʃɑːrp/
Having a fine cutting edge or piercing point.
The sharp knife cuts a paper-thin slice from the ripe tomato.

Etymology
Old English scearp already described cutting edges and pointed objects. The selected meaning preserves that physical sense: an edge suited to cutting or a point suited to piercing.
In context
cut the workbench here and that's because there is a razor sharp edge on here
More examples
- Watch out for sharp edges on the broken glass.
- The rose has sharp thorns along its stem.
- I need sharper scissors to cut this thick fabric.
Forms
sharp · sharper · sharpest
sharpen verb — To give a finer edge or point.
sharpness noun — The quality of cutting or piercing easily.