/faʊnˈdeɪʃən/
a principle, an idea or a fact that sth is based on and that it grows from 基本原理；根据；基础
Respect and friendship provide a solid foundation for marriage.
尊重和友爱是婚姻的牢固基础。
The rumour is totally without foundation (= not based on any facts).
这谣传毫无事实根据。
These stories have no foundation (= are not based on any facts).
这些故事纯属虚构。
adjective
foundational
Denoting an underlying basis or principle; fundamental.
the foundational principles of Christianity
rules are a foundational element in game design