Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.
Class IV. Words Relating to the Intellectual FacultiesDivision (II) Communication of Ideas
Section III. Means of Communicating Ideas
Various Qualities of Style
570. Perspicuity.
NOUN:PERSPICUITY (intelligibility) [See Intelligibility]; plain speaking (manifestation) [See Manifestation]; definiteness, definition; exactness [See Truth]; explicitness, lucidness, lucidity, limpidity, clearness.ADJECTIVE:LUCID (intelligible) [See Intelligibility]; limpid, pellucid, clear; explicit (manifest) [See Manifestation]; exact [See Truth].
QUOTATION:Clear conception leads naturally to clear and correct expression.—Boileau