Of or characteristic of rural workmanship; of a rough, plain, or simple form or style; esp. made of undressed branches or roots of trees.

= incurious, adj. 5. Obsolete.

Not carefully or exquisitely prepared, made, composed, or done; plain, homely, coarse.

Of a rustic form or make; rough, plain, or simple in appearance. Obsolete.

Not elaborate; not having much labour expended on it; simple or slight in workmanship.

(Extended use of sense 9, passing into adj.) Crude; rough and ready; without the formal training or qualifications usually considered necessary…