1. (adjective) not clearly understood or expressed

• unintelligible

1. (adjective) not transmitting or reflecting light or radiant energy; impenetrable to sight

• cloudy
• mirky
• muddy
• murky
• turbid
• fogged
• foggy
• frosted
• glaucous
• light-tight
• lightproof
• milklike
• milky
• whitish
• semiopaque
• solid

2. (adjective) not clearly understood or expressed

• incomprehensible
• uncomprehensible

1. (adjective) not transmitting or reflecting light or radiant energy; impenetrable to sight

• unclear

1. (adjective) not transmitting or reflecting light or radiant energy; impenetrable to sight

• clear

1. (adjective) not transmitting or reflecting light or radiant energy; impenetrable to sight

• opacity
• opacity
• opaqueness
• opaqueness
• opacity

2. (adjective) not clearly understood or expressed

• incoherence
• incoherency
• unintelligibility
• opacity
• opacity
• opaqueness
• opaqueness