basic

nouns

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

adjectives

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"
antonym
is similar to
serving as or forming a base
"the painter applied a base coat followed by two finishing coats"
is similar to
of or being the essential or basic part
"an elementary need for love and nurturing"
is similar to
being or involving basic facts or principles
"the fundamental laws of the universe"; "a fundamental incomatibility between them"; "these rudimentary truths"; "underlying principles"
is similar to
fundamental
"the grassroots factor in making the decision"
is similar to
arising from or going to the root or source
"a radical flaw in the plan"
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
is similar to
relating to or containing an alkali; having a pH greater than 7
"alkaline soils derived from chalk or limestone"
domain category
the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions