basic

Necessary, essential for life or some process.

“Flour is a basic ingredient of bread.”

Elementary, simple, fundamental, merely functional.

“The Hotel Sparta’s accommodation is very basic.”

chemistryOf or pertaining to a base; having a pH greater than 7.

informalUnremarkable or uninteresting; boring; uncool.

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”

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

A necessary commodity, a staple requirement.

“Rice is a basic for many Asian villagers.”

An elementary building block, e.g. a fundamental piece of knowledge.

“Arithmetic is a basic for the study of mathematics.”

“I know the basics of sailing and would love to learn more.”

militaryBasic training.

“The drill sergeants gave him hell in basic.”

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 in the plural) a necessary commodity for which demand is constant