| Answer | Crossword Clue |
|---|---|
| SEALED | Secured against leakage |
| SEAL | Secure against leakage |
| leakproof | proof against leakage |
| CALKS | Makes tight against leakage. |
| caulk | to stop up and make tight against leakage (as a boat or its seams, the cracks in a window frame, or the joints of a pipe) |
| unsecured | not secured, esp. not insured against loss, as by a bond or pledge |
| debentures | A long-term security yielding a fixed rate of interest, issued by a company and secured against assets |
