liquid, limpid -- (clear and bright; "the liquid air of a spring morning"; "eyes shining with a liquid luster"; "limpid blue eyes")
crystalline, crystal clear, limpid, lucid, pellucid, transparent -- (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")
limpid, lucid, luculent, pellucid, crystal clear, perspicuous -- ((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")
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