cardboard
//ˈkɑːrd.bɔːrd//
Noun
1
A stiff, thick paper material made from layers of paper pulp, used for making boxes and packaging.
We packed our books in cardboard boxes.
Synonym
Adjective
cardboardCanonical form
1
Made of cardboard.
The children built a cardboard castle in the living room.
2
Lacking depth, substance, or realism; flat and unconvincing.
The movie was ruined by cardboard characters that no one could care about.