Doxian

According to the Old English Dictionary:

doxian

p. ode To become dark-coloured:--Hwílum hé (the dead body) bið swíðe láðlicum men gelíc; þonne wannað hé and doxaþ; óðre hwíle hé bið blǽc and ǽhíwe, Verc. fol. 23 b. [N. E. D. dusk; vb.] doxian