Maybe the word 'like' would be sufficient.
The four letter word that means, "I forbid," is veto.veto
The four letter word is dawn.
Exit
fern
A four letter word meaning the foundation of something is base.
Four-sided, four-angled. Quad means four, so if it is used in geometry, it means the same thing as a quadrangle.
aide
Fast
asea
step
Talk.
papa