Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

570. Perspicuity — N. perspicuity, perspicuousness &c

(intelligibility) 518; plain speaking &c (manifestation) 525; definiteness, definition; exactness &c 494; explicitness, lucidness. Adj. lucid &c (intelligible) 518; explicit &c (manifest) 525; exact &c 494.