"sharp-sighted," also "of acute mental discernment," 1630s, formed as an adjective to perspicacity, from Latin perspicax "sharp-sighted, having the power of seeing through; acute," from perspicere "look through, look closely at," from per "through" (from PIE root *per- (1) "forward," hence "through") + specere "look at" (from PIE root *spek- "to observe"). Related: Perspicaciously; perspicaciousness.
much too perspicacious to be taken in by such a spurious argument
much too perspicacious to be taken in by so spurious an argument
personification
personify
personnel
perspective
Perspex
perspicacious
perspicacity
perspicuity
perspicuous
perspiration
perspire