master, baseborn, meanspirited, rudimental, beginning, radical, humble, base, rudimentary, extremist, chief, mean, original, main, surface, revolutionary, start, underlying, immoral, lowly, principal, ultra
pure (part of speech: adjective)
blameless, irreducible, chaste, angelic, primal, pure, aboriginal, immaculate, formative, primary, undiluted, purebred, basic, honorable, elementary, unadulterated, spotless, uncluttered, innocent, unsullied, undefiled, unblemished, essential, sinless, guiltless, simon-pure, stainless, monolithic, prime, nascent, faultless, austere, decent, stark, unadorned, white, unalloyed, virtuous, clean, bare, elemental, clear, atomic, untarnished, untainted, plain, indivisible, foundational, fundamental, simple
- The cleavage is parallel to the basal plane. - "The Chemistry, Properties and Tests of Precious Stones", John Mastin.
- Diagnosis of Basal Fractures. - "Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition.", Alexander Miles Alexis Thomson.
- Or, as in the crystal and the shell, may there not exist distinctions more profound and basal? - "Natural Law in the Spiritual World", Henry Drummond.