(s)crude, primitive, rudebelonging to an early stage of technical development; characterized by simplicity and (often) crudeness“the crude weapons and rude agricultural implements of early man”, “primitive movies of the 1890s”, “primitive living conditions in the Appalachian mountains”
(s)archaic, primitivelittle evolved from or characteristic of an earlier ancestral type“archaic forms of life”, “primitive mammals”, “the okapi is a short-necked primitive cousin of the giraffe”
(s)primitive, naiveof or created by one without formal training; simple or naive in style“primitive art such as that by Grandma Moses is often colorful and striking”