cornerstone
cor-ner-stone
noun
A fundamental principle, idea, or element upon which something important is based.
"Trust is the cornerstone of any good relationship."
Thesaurus
Synonyms: groundwork, base, fundament, foundation, basis
cor-ner-stone
A fundamental principle, idea, or element upon which something important is based.
"Trust is the cornerstone of any good relationship."
Synonyms: groundwork, base, fundament, foundation, basis