KEY: Lucid.
SYN: Shining, bright, resplendent, Incident, luminous, clear,trans_parent, crystalline, pellucid, distinct, intelligible,rational, perspicuous, orderly, limpid, lucent, easily_under, stood.
ANT: Dark, unlustrous, opaque, turbid, muddy, obscure,unintelligible, confused, unsolved, insane, mystified.

• Indistinguishable
• Indite
• Individual
• indocility_
• Indoctrinate, [See INSTRUCT]
• Indolence, [See ACTIVITY]
• Indolent, [See ACTIVE]
• Indomitable
• Indorse
• Indubious
• Indubitable, [See DOUBT_and_INCONTESTABLE]
• Induce \v
• Induction
• Indue, [See DIVEST]
• Indulge
• Indulgence, [See DILIGENCE]
• Indulgent
• Indurate, [See HARDEN]
• Industrious
• Industry
• Inebriety, [See EBRIETY]
• Ineffable
• Ineffectual
• Inelastic, [See ELASTIC]
• Inelegant, [See ELEGANCE]