brier (n.2)youdaoicibaDictYouDict[brier 词源字典]
type of tobacco pipe introduced to England c. 1859 and made from the root of a certain shrub, 1868, from French bruyère "heath plant," from Old French bruiere "heather, briar, heathland, moor" (12c.), from Gallo-Roman *brucaria, from *brucus "heather," from Gaulish (compare Breton brug "heath," Old Irish froech). Form altered in English by influence of brier (n.1).[brier etymology, brier origin, 英语词源]
moor (n.)youdaoicibaDictYouDict
"waste ground," Old English mor "morass, swamp," from Proto-Germanic *mora- (cognates: Old Saxon, Middle Dutch, Dutch meer "swamp," Old High German muor "swamp," also "sea," German Moor "moor," Old Norse mörr "moorland," marr "sea"), perhaps related to mere (n.), or from root *mer- "to die," hence "dead land."
The basic sense in place names is 'marsh', a kind of low-lying wetland possibly regarded as less fertile than mersc 'marsh.' The development of the senses 'dry heathland, barren upland' is not fully accounted for but may be due to the idea of infertility. [Cambridge Dictionary of English Place-Names]