\ih-SPAHY-uhl\ noun 1. the act of spying. 2. the act of keeping watch; observation.
Quotes
The landlord of the house had not withdrawn his eye from this place of espial for five minutes, and Barney had only just returned from making the communication above related, when Fagin, in the course of his evening's business, came into the bar to inquire after some of his young pupils. -- Charles Dickens, Oliver Twist, 1838 s Origin Espial is related to the word espy, which comes from the German word spΓ€hen meaning "to spy." The suffix -al forms nouns from verbs, as in the word refusal.