Fundament :: Fundament (n.) The part of the body on which one sits; the buttocks; specifically (Anat.), the anus..
Fundamental :: Fundamental (a.) Pertaining to the foundation or basis; serving for the foundation. Hence: Essential, as an element, principle, or law; important; original; elementary; as, a fundamental truth; a fundamental axiom..
Fundamental :: Fundamental (n.) A leading or primary principle, rule, law, or article, which serves as the groundwork of a system; essential part, as, the fundamentals of the Christian faith..
Fundamentally :: Fundamentally (adv.) Primarily; originally; essentially; radically; at the foundation; in origin or constituents.