mould
Definitions
A hollow container used to give a specific shape to molten or hot liquid material as it cools and hardens.
A furry growth of minute fungal hyphae occurring typically in moist, warm conditions on organic matter.
To form or shape an object or material into a particular form.
Examples
The damp conditions in the basement caused black mould to grow on the walls.
The sculptor carefully poured the liquid clay into the plaster mould to create the statue.