primitive

An original or primary word; a word not derived from another, as opposed to derivative.

A member of a primitive society.

A simple-minded person.

A data type that is built into the programming language, as opposed to more complex structures.

Any of the simplest elements (instructions, statements, etc.) available in a programming language.

A basic geometric shape from which more complex shapes can be constructed.

A function whose derivative is a given function; an antiderivative.

Of or pertaining to the beginning or origin, or to early times; original; primordial; primeval; first.

“primitive innocence;   the primitive church”

Of or pertaining to or harking back to a former time; old-fashioned; characterized by simplicity.

“a primitive style of dress”

Crude, obsolete.

“primitive ideas”

(grammar) Original; primary; radical; not derived.

“a primitive verb”

Occurring in or characteristic of an early stage of development or evolution.

Not derived from another of the same type

Most recent common ancestor (often hypothetical) of