basic

pertaining to or constituting a base or basis; "a basic fact"; "the basic ingredients"; "basic changes in public opinion occur because of changes in priorities"

reduced to the simplest and most significant form possible without loss of generality; "a basic story line"; "a canonical syllable pattern"

serving as a base or starting point; "a basic course in Russian"; "basic training for raw recruits"; "a set of basic tools"; "an introductory art course"

of or denoting or of the nature of or containing a base

a popular programming language that is relatively easy to learn; an acronym for beginner''s all-purpose symbolic instruction code; no longer in general use

(usually plural) a necessary commodity for which demand is constant