Clue: Hard to penetrate
We have 1 answer for the crossword clue Hard to penetrate.
Possible Answers:
Related Clues:
- Opaque
- Solid
- Like a rain forest
- None too swift
- Jam-packed
- Like rain forests
- Slow-witted
- Not too bright
- Half-witted
- A few bricks shy of a load
- (k) Thick
- Like some fog
- Highly concentrated
- Like a blockhead
- Thick as a brick
- Not the brightest bulb on the tree
- Not exactly a genius
- Dumb
- Like pea soup fog
- Like thick fog
- Not getting it
- Like lush forests
- Postman's beat
- Compacted
- Heavy, like some baked goods
- ... and 36 more.
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