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fundamental

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adjective

of or forming a foundation or basis; basic; essential: the fundamental rules of art
relating to what is basic; radical: a fundamental alteration
on which others are based; primary; original: a fundamental type
most important; chief: his fundamental needs
Music
1. designating or of the lowest, or root, tone of a chord
2. designating the prime or main tone of a harmonic series
Physics designating or of a fundamental

noun

a principle, theory, law, etc. serving as a basis; essential part
Music
1. the lowest, or root, tone of a chord
2. the prime or main tone of a harmonic series
Physics the lowest frequency at which a system, as an air column or stretched string, will freely vibrate

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fundamentally adverb

See fundamental in American Heritage Dictionary 4

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