Earthen (adjective)

1. Made of, or resembling, earth or clay.
2. Plain and simple in style or design, and sometimes seeming rough or unfinished.

Origin:

Late middle english, from old english ǣrðen, of earth, from ǣr, earth.

Examples:

1. The walls of the earthen hut were thick and sturdy.
2. The potters made earthenware vessels that were both functional and decorative.
3. Her earthen face was lit up with a broad smile.
4. The country roads were dusty and earthen.
5. The earthen ramparts surrounded the castle.