basis

nouns

a relation that provides the foundation for something

"they were on a friendly footing"; "he worked on an interim basis"

basis, footing, ground

the fundamental assumptions from which something is begun or developed or calculated or explained

"the whole argument rested on a basis of conjecture"

base, basis, cornerstone, foundation, fundament, groundwork

the most important or necessary part of something

"the basis of this drink is orange juice"

base, basis