The Collaborative International Dictionary
Forlay
Forlay \For*lay"\, v. t. [Pref. for- + lay.] To lie in wait for; to ambush.
An ambushed thief forlays a traveler.
--Dryden.
Wiktionary
forlay
vb. 1 (context transitive obsolete English) To lay aside. 2 (context transitive English) To lie in wait for; ambush.