substratal

elemental essential key main necessary primary primitive underlying vital

capital central chief principal radical

basal indispensable inherent intrinsic

auxiliary inessential insignificant minor nonessential secondary unimportant unnecessary

extra

additional outside peripheral

elemental fundamental rudimentary straightforward underlying

ABCs abecedarian basal beginning child's play clear duck soup easy essential facile foundational initial introductory meat and potatoes original plain prefatory preliminary primary primitive primo simplest simplex simplified uncomplex uncomplicated

additional advanced extra secondary

abstruse complex complicated compound difficult hard intricate involved

absolute constitutional elemental inherent intrinsic key main underlying

cardinal cold ideal material nitty-gritty nub perfect primary prime primitive principal

basal bottom-line complete congenital connate deep-seated elementary inborn inbred innate meat-and-potatoes quintessential

acquired extrinsic incidental inessential insignificant learned nonessential secondary unimportant

flawed imperfect minor wrong

accessory atypical auxiliary subsidiary

central constitutional crucial elemental elementary essential indispensable integral intrinsic major necessary paramount principal radical significant structural theoretical underlying vital

bottom cardinal first key organic original primary prime primitive requisite supporting

axiological axiomatic basal bottom-line constitutive foundational grassroots meat-and-potatoes primordial rudimentary substrative sustaining underived

accessory auxiliary extrinsic inessential insignificant learned least lesser minor needless nonessential secondary trivial unimportant unnecessary

additional advanced extra subordinate

archaic basic primeval primordial pristine undeveloped

essential first fundamental old primary

earliest early elementary primal underivative underived underlying unevolved

modern new

auxiliary

cultured current present sophisticated

ABCs abecedarian basal basic beginning child's play clear duck soup easy elemental essential facile foundational fundamental initial introductory meat and potatoes original plain prefatory preliminary primary primitive primo rudimentary simplest simplex simplified straightforward uncomplex uncomplicated underlying

basic elemental hidden

bottom concealed lurking prime root veiled

basal bottom-line cardinal critical crucial elementary essential indispensable intrinsic necessary needful nitty-gritty nub primary primitive radical vital

secondary