noun / verb / adjective
mass
MASS/mæs/
A large quantity gathered as one body.
The heavy mass of stone rests firmly on the ground.

Etymology
Latin massa pictured dough or material sticking together in a lump. English broadened that coherent lump into a large quantity, amount, or body of something.
In context
however the buggy is found half-absorbed by the SCP-610 mass covering the floor.
More examples
- Protesters mass outside city hall before the vote.
- The approaching wildfire forces a mass evacuation.
- Masses of dark clouds gather over the lake.
Forms
mass · masses · massed · massing
massive adjective — Very large in size, amount, or extent.