| Rating | Solver | Clue |
|---|---|---|
| AIRTIGHT | Impermeable | |
| COSTIVE | Dry and hard; impermeable; unyielding. | |
| IMPERMEABILITY | The quality of being impermeable. | |
| AIR-TIGHT | So tight as to be impermeable to air; as, an air-tight cylinder. | |
| SCAPHANDER | The case, or impermeable apparel, in which a diver can work while under water. | |
| IMPERMEABLE | Not permeable; not permitting passage, as of a fluid. through its substance; impervious; impenetrable; as, India rubber is impermeable to water and to air. | |
| CAOUTCHOUC | ... or Hevea caoutchouc), Asia, and Africa. Being impermeable to liquids and gases, and not readly affected by exposure to air, acids, and alkalies... | |