FUNDAMENTAL
cardinal, central, fundamental, key, primal
(adjective) serving as an essential component; “a cardinal rule”; “the central cause of the problem”; “an example that was fundamental to the argument”; “computers are fundamental to modern industrial structure”
fundamental, rudimentary, underlying
(adjective) being or involving basic facts or principles; “the fundamental laws of the universe”; “a fundamental incompatibility between them”; “these rudimentary truths”; “underlying principles”
fundamental, profound
(adjective) far-reaching and thoroughgoing in effect especially on the nature of something; “the fundamental revolution in human values that has occurred”; “the book underwent fundamental changes”; “committed the fundamental error of confusing spending with extravagance”; “profound social changes”
fundamental, fundamental frequency, first harmonic
(noun) the lowest tone of a harmonic series
fundamental
(noun) any factor that could be considered important to the understanding of a particular business; “fundamentals include a company’s growth, revenues, earnings, management, and capital structure”
Source: WordNet® 3.1
Etymology
Noun
fundamental (plural fundamentals)
(usually, in the plural) A leading or primary principle, rule, law, or article, which serves as the groundwork of a system; an essential part
(physics) The lowest frequency of a periodic waveform.
(music) The lowest partial of a complex tone.
Adjective
fundamental (comparative more fundamental, superlative most fundamental)
Pertaining to the foundation or basis; serving for the foundation.
Essential, as an element, principle, or law; important; original; elementary.
Synonyms
• groundlaying
• See also bare-bones
Hyponyms
• quite-as-fundamental
• not-quite-as-fundamental
Source: Wiktionary
Fun`da*men"tal, a. Etym: [Cf. F. fondamental.]
Definition: 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.
The fundamental reasons of this war. Shak.
Some fundamental antithesis in nature. Whewell.
Fundamental bass (Mus.), the root note of a chord; a bass formed of
the roots or fundamental tones of the chords.
– Fundamental chord (Mus.), a chord, the lowest tone of which is
its root.
– Fundamental colors, red, green, and violet-blue. See Primary
colors, under Color.
Fun"da*men`tal, n.
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition