fundamental
far-reaching and thoroughgoing in effect especially on the nature of something
fundamentals
principles from which other truths can be derived
fundamental
being or involving basic facts or principles
fundamental
the lowest tone of a harmonic series
fundament
the fleshy part of the human body that you sit on
fundament
the fundamental assumptions from which something is begun or developed or calculated or explained
fundament
lowest support of a structure
fundamental
serving as an essential component
fundamentally
at bottom or by one's (or its) very nature
fundamentalism
the interpretation of every word in the sacred texts as literal truth