essential; extremely important
Related to a foundation. base, or basis; serving as a foundation.
The lowest frequency of a periodic waveform.
A main or major principle, rule, law, etc. which serves as the foundation or basis of a system; an essential part
The lowest partial of a complex tone.
Of the highest importance.
Highest, supreme; also, chief, leading, pre-eminent.
A chief or superior; (specifically, chiefly South Africa) an African chief having the highest status in a region; a paramount chief.