roil
vex
Irk
The four letter word that means, "I forbid," is veto.veto
"Disrupt" is a word that means to disturb or cause worry or difficulties.
The four letter word is dawn.
Disturb.
Disturb
Exit
A four letter word meaning the foundation of something is base.
The word is scam.
Rend is a four letter word that means to tear into pieces. Tear is also a four letter word meaning to pull apart.
Break in (up)on means disturb, interrupt.