cardboard
🇺🇸
/ˈkɑːrdbɔːrd/
🇬🇧
/ˈkɑːdbɔːd/
A stiff, thick paper material used for making boxes and packaging.
We used cardboard to build a small box for the gifts.
Not real or deep; seeming fake or artificial.
The movie had cardboard characters who didn't feel real.