noun
plank
PLANK/plæŋk/
A long flat piece of sawn wood.
A long wooden plank rests across two sawhorses, showing its grain.

Etymology
The earlier “broad slab or board” sense survives directly in the timber used for building. Its further connection with Latin plancus, “flat, flat-footed,” is probable rather than certain.
In context
I sketched out the shape, saw it from a plank, and immediately made enough noise
More examples
- We replace a rotten plank in the porch floor.
- She sands the plank before painting it.
- Three wide planks form the top of the table.
Forms
plank · planks
planking noun — Boards laid together to form a surface.