es·pi·al /ɪsˈpaɪ(ə)l/
偵探,間諜活動,觀察
Es·pi·al n.
1. The act of espying; notice; discovery.
Screened from espial by the jutting cape. --Byron.
2. One who espies; a spy; a scout. [Obs.] “Their espials . . . brought word.”
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espial
n : the act of detecting something; catching sight of something
[syn: detection, catching, spying, spotting]