Word Study
astert
CIDE DICTIONARY
astert, v. t. [Pref. a- + start; OE. asterten, asturten.].
To start up; to befall; to escape; to shun. Spenser. [1913 Webster]
astert, v. i.
To escape. Chaucer. [1913 Webster]
For further exploring for "astert" in Webster Dictionary Online