primitive

Of or relating to an early or original stage or state; primeval.

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

Having developed early in the evolutionary history of a group.

Regarded as having changed little in evolutionary history. Not in scientific use.

Characterized by simplicity or crudity; unsophisticated.

Of or relating to a nonindustrial, often tribal culture, especially one that is characterized by an absence of literacy and a low level of economic or technological complexity.

Not derived from something else; primary or basic.

Serving as the basis for derived or inflected forms.