Enter a clue or pattern or both:
The Clue
Caisson compartment (7 letter answer)
The Answer
AIRLOCK
Tags
Notes
The answer AIRLOCK is so rare that it appears less than once every 2500 puzzles.
Related Clues
Stoppage in a pump
Definition
AIRLOCK as a noun:
1. (airlock, air lock) = a chamber that provides access to space where air is under pressure