cornerstone
noun
[ ˈkɔːnəstəʊn ]
• an important quality or feature on which a particular thing depends or is based.
• "a national minimum wage remained the cornerstone of policy"
Similar:
foundation,
basis,
keystone,
mainspring,
mainstay,
linchpin,
bedrock,
fundament,
base,
key,
fundamental principle,
main ingredient,
central component,
centrepiece,
core,
heart,
centre,
focus,
crux,
prop,
backbone,
anchor,
• a stone that forms the base of a corner of a building, joining two walls.
