basis

Meanings

• a relation that provides the foundation for something
  • "he worked on an interim basis"
• the fundamental assumptions from which something is begun or developed or calculated or explained
  • "the whole argument rested on a basis of conjecture"
• the most important or necessary part of something
  • "the basis of this drink is orange juice"

Synonyms

base, cornerstone, footing, foundation, fundament, ground, groundwork