1 And all the while she stood upon the ground, 2 The wakeful dogs did never cease to bay,
wakeful dogs > (See Aen. 6.257)
3 As giving warning of the unwonted sound
As > [As though] unwonted > unaccustomed
4 With which her iron wheels did them affray,
affray > terrify
5 And her dark grisly look them much dismay;
grisly > horrible, fearsome
6 The messenger of death, the ghastly owl,
ghastly > terrible, causing terror (from same root as "ghost") owl > (To the Romans, an omen of death: see Met. 10.453; see also 109.33:6, etc.)