fundamental
Pronunciation:
/ˌfʌndəˈmɛntəl/noun
Definitions
(usually in the plural) A leading or primary principle, rule, law, or article, which serves as the groundwork of a system; an essential part
Example: one of the fundamentals of linear algebra
The lowest frequency of a periodic waveform.
The lowest partial of a complex tone.
adjective
Definitions
Pertaining to the foundation or basis; serving for the foundation.
Essential, as an element, principle, or law; important; original; elementary.
Example: A need for belonging seems fundamental to humans.