Related Clues:
- Delayed, as in traffic
- Like some populations
- Unable to go further
- In a mire
- Scarcely bright
- Not very bright, but studies English
- Packed in tight
- Having a high specific gravity
- Overgrown, as a rain forest
- Needing a tow
- At a standstill in traffic
- Like Archie's pal Moose
- Obtuse — impenetrable
- Crowded together, which is stupid
- Solid, thick