† a-ˈthester, v. Obs.
[OE. aþéostrian, f. a- prefix 1 + þéostrian: see thester v.]
To grow dim, darken, become obscure.
| c 885 K. ælfred Boeth. ix, Þonne aðéostriaþ ealle steorran. c 1175 Cott. Hom. 239 Si sunne and se mone aþestreð for godes brictnesse. 1205 Lay. 2860 Enne blase of fure, Þe neuer ne aþeostrede. |