Dr ＞ ðr ＞ ir: divīdĕre ＞ devire, quadrum ＞ caire, vídēr’ hábe̯o ＞ veð’r-áyo ＞ veirái. After au, apparently, ð simply disappeared: claudĕre ＞ claure. Late learned words have dr: quadrupedi.
Gr, in popular words, was reduced to r in Vulgar Latin in parts of the Empire fra(g)rāre ＞ ✱frarar ✱flarar flazar, intĕ(g)rum ＞ entęr entięr, nĭ(g)rum ＞ nęr nięr,[64] pere(g)rīnum ＞ peleri, pĭ(g)rĭtia ＞ perẹza; these forms occur in Gascony, Rouergue, and Limousin, but forms with gr are found in the same region. Elsewhere, in these same words, and everywhere, in more bookish words, gr remained in Vulgar Latin; this gr was kept in most of the Provençal territory, but was changed to ir in Dauphiné, Auvergne, and Languedoc: fragrāre ＞ flairar, integrāre ＞ enteirar, intĕ́grum ＞ entęgre entęir,[65] nĭgrēscĕre ＞ negrezir, nĭgrum ＞ nẹgre nẹir,[65] peregrīnum ＞ pelegri, pĭgrĭtia ＞ pigręza. Purely learned words have gr everywhere: agricultura.
G´r: see Yr.
Lr usually remained unaltered, but in some dialects became ldr[66]: vălēr’ hábe̯o ＞ valrai valdrai, ✱vólēr’ hábe̯o ＞ volrai voldrai.
Mr ＞ mbr: camĕra ＞ cambra, memorāre ＞ membrar, nŭmĕrum ＞ nọmbre.
Nr usually remained unaltered, but in some dialects became ndr[66] cĭnĕrem ＞ cẹnre cẹndre, dīe Vĕnĕris ＞ divenres divendres, in-gĕnerāre ＞ engenrar, Henrīcum ＞ Enric, expōnĕre ＞ espọnre espọndre, ✱gĕnĕrem (= gĕnus) ＞ genre, gĕnĕrum ＞ genre gendre, honorāre ＞ onrar ondrar, tenēr’ habeo ＞ tenrai tendrai, venīr’ habeo ＞ venrai vendrai.
Pr ＞ br: capra ＞ cabra, cŭperāre ＞ cobrar, erĭpĕre ＞ erẹbre, ŏpĕra ＞ ǫbra, pauper ＞ paubre, ✱pĭperāta ＞ pebrada, recĭpĕre ＞ recẹbre, sŭperāre ＞ sobrar, sŭper ＞ sọbre. Purely learned words have pr: caprin. It is uncertain whether paupre (beside the usual paubre) is a Latinism or represents some dialect in which au prevented voicing.
Sr ＞ str: ✱ĕssĕre (= ĕsse) ＞ ęstre. For ęsser, see § [49], (2).
Tr ＞ dr ＞ ðr ＞ ir: amātor ＞ amaire, fratrem ＞ fraire, latro ＞ laire, mater ＞ maire, ŭtĕrem ＞ ọire, pĕtra ＞ pęira, Pĕtrus ＞ Pęires, petrōnem ＞ peirọ, petrōsus ＞ peirọs, pre(s)by̆tĕrum (Einf., § 140) ＞ prevẹire, servītor ＞ servire, vĭtrum ＞ vẹire. Learned words have dr and tr: ✱poenĭtĕre ＞ penedre (penedir), impetrāre ＞ impetrar.