v. Obs. [OE. to-hréosan, f. TO-2 + hrēosan, REOSE (where see Forms).] intr. To fall to pieces, fall into ruins; to decay.
a. 900. trans. Bædas Hist., I. xi. [xiii.] (1890), 48. Moniʓe oðre ceastre tohrorene wæron.
a. 1023. Wulfstan, Hom., xlix. (Napier), 263. Þonne bið þa lichaman tohrorene and to duste ʓewordene.
c. 1205. Lay., 9245. Al heo gunnen to-reosen. Ibid., 9426. Þus Port-chæstre to-ræs [c. 1275 to-reos].