espial
An act of noticing or observing.
countable, uncountable
Secure—unnoted—Conrad's prow pass'd by, / And anchor'd where his ambush meant to lie; / Screen'd from espial by the jutting cape, / That rears on high its rude fantastic shape.
The fact of noticing or observing; a discovery.
countable, uncountable
A scout; a spy.
countable, obsolete, uncountable
these be most necessarie for the espials belonging vnto a camp
Where it comes from
From Middle English espiaille, from Old French espier (“to watch”).
Adapted from the Wiktionary entry espial (CC BY-SA 4.0).