The adjective amorphous means something that has no clear shape or structure.

Synonyms are baggy, blobby, nebulous, or vague.

The word origins from Modern Latin (1731) amorphus, and from Greek amorphos meaning “without form, shapeless, deformed”. It comes from a- meaning “without” plus morphē meaning “form”.

Amorphous carbon is free and does not have any crystalline structure.

It is common to have an amorphous mass of buildings and highways.

Amorphous silicon is a low-cost material for solar cells.