The foundation of something can be described as its "base." The base of an object or concept is its fundamental support or underlying structure. It provides stability and strength to the rest of the entity.
What is a 4 letter word that means a foundation of something
The four letter word for repairing something is mend.
have
One such word is evil.
seat
grip
base
The four letter word for repairing something is mend.
grip
seat
have
A four letter word for something a violinist needs could be Bows.
Urge
One such word is evil.
seat
grip
lose
vase