LUCULENT
limpid, lucid, luculent, pellucid, crystal clear, perspicuous
(adjective) (of language) transparently clear; easily understandable; “writes in a limpid style”; “lucid directions”; “a luculent oration”- Robert Burton; “pellucid prose”; “a crystal clear explanation”; “a perspicuous argument”
Source: WordNet® 3.1
Etymology
Adjective
luculent (comparative more luculent, superlative most luculent)
(now rare) Shining, brilliant.
(obsolete) Of language, speeches etc: lucid, brilliantly clear.
Source: Wiktionary
Lu"cu*lent, a. Etym: [L. luculentus, from lux, lucis, light.]
1. Lucid; clear; transparent. Thomson.
2. Clear; evident; luminous. " Most luculent testimonies." Hooker.
3. Bright; shining in beauty. [Obs.]
Most debonair and luculent lady. B. Jonson.
Source: Webster’s Unabridged Dictionary 1913 Edition