Perspicacious vs Perspicuous
Perspicuousadjective
(of language) transparently clear; easily understandable
The difference
Perspicacious describes a person — keenly perceptive. Perspicuous describes writing or speech — clearly expressed. A perspicacious reader; a perspicuous argument.
How to keep them apart
The perspicacious mind sees through things; perspicuous prose is what you can see through.