uncomplex

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 substratal uncomplicated

additional advanced extra secondary

abstruse complex complicated compound difficult hard intricate involved

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 substratal uncomplicated underlying

folksy homey humble laid-back modest simple straightforward unassuming

unostentatious

discreet down down home easygoing free-spirited inelaborate lowly plain prosaic unaffected unambitious unbeautified unembellished unimposing unobtrusive unpresumptuous unspoiled up front

bold brave conceited egotistical presumptuous proud

affected dishonest flaunting pretending pretentious