ruralyoudaoicibaDictYouDict[rural 词源字典]
rural: [15] Latin rūs denoted ‘the country’ (it came ultimately from an Indo-European ancestor meaning ‘open space’, which also produced English room). Its stem form was rūr-, on which was based the adjective rūrālis, source of English rural. A related adjective, this time derived from the nominative form, was rūsticus, which has given English rustic [15], and is also the ultimate source (via Old French rustre ‘ruffian’) of English roister [16].
=> roister, room, rustic[rural etymology, rural origin, 英语词源]
rural (adj.)youdaoicibaDictYouDict
early 15c., from Old French rural (14c.), from Latin ruralis "of the countryside," from rus (genitive ruris) "open land, country," from PIE *reue- (1) "to open; space" (see room (n.)).
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.