ラテン語のruralis、rus、open country、countrysideから、PIE*reue、to unfold、room、rusticと語源的には同じ。
In early examples, there is usually little or no difference between the meanings of rural and rustic, but in later use the tendency is to employ rural when the idea of locality (country scenes, etc.) is prominent, and rustic when there is a suggestion of the more primitive qualities or manners naturally attaching to country life. [OED]Related: Rurally.