PELLUCID
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”
crystalline, crystal clear, limpid, lucid, pellucid, transparent
(adjective) transmitting light; able to be seen through with clarity; “the cold crystalline water of melted snow”; “crystal clear skies”; “could see the sand on the bottom of the limpid pool”; “lucid air”; “a pellucid brook”; “transparent crystal”
Source: WordNet® 3.1
Etymology
Adjective
pellucid (comparative more pellucid, superlative most pellucid)
Allowing the passage of light; transparent.
Easily understood; clear.
Synonyms
• (allowing passage of light): clear, limpid, lucid, translucent
• (easily understood): clear, crystal clear, lucid, translucent
Source: Wiktionary
Pel*lu"cid, a. Etym: [L. pellucidus; per (see Per-) + lucidus clear,
bright: cf. F. pellucide.]
Definition: Transparent; clear; limpid; translucent; not opaque. "Pellucid
crystal." Dr. H. More. "Pellucid streams." Wordsworth.
Source: Webster’s Unabridged Dictionary 1913 Edition