Related Clues:
- Not clearly expressed
- Light-blocking
- Difficult to understand
- Not sheer
- Indefinite
- Nebulous or unclear
- Impervious to light
- Nebulous, unclear
- Not transparent or clear
- Hazy, unclear
- Mucky, marshy
- Not clear, resistant to light
- Not transmitting or reflecting light
- Not transparent, light can't pass through
- Not clear or transparent