blade
The word evokes a sense of precision and narrowness. It describes an object where the thinness of the profile is essential to its function, whether that function is slicing through a material or slicing through the air to create lift or propulsion. While a knife is the whole tool, the blade is specifically the cutting edge. This distinction is often used in technical or forensic contexts to isolate the functional part of the instrument from the handle or hilt.
Used for distinct physical objects like a knife edge, a propeller part, or a single piece of grass.
Meanings
The flat, sharp-edged part of a tool or weapon used for cutting.
"The chef sharpened the blade of his knife."
A flat piece of metal or plastic that rotates to move air or water.
"The wind turbine has three massive blades."
A single leaf of grass.
"A single blade of grass poked through the concrete."
Examples
The chef sharpened the blade of his knife.
The wind turbine has three massive blades.
A single blade of grass poked through the concrete.