| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | impervious to water |
| Synonyms: | airtight, impermeable, impervious, sealed |
| Antonyms: | leaky |
| Main Entry: | hermetic |
| Part of Speech: | adjective |
| Definition: | airtight |
| Synonyms: | completely sealed, impervious, sealed, shut, tight, waterproof, watertight |
| Main Entry: | impermeable |
| Part of Speech: | adjective |
| Definition: | impenetrable |
| Synonyms: | airtight, dense, hermetic, impassable, impervious, leak-proof, nonporous, sealed, water-resistant, waterproof, watertight |
| Main Entry: | seal |
| Part of Speech: | verb |
| Definition: | make airtight |
| Synonyms: | close, cork, enclose, fasten, gum, isolate, paste, plaster, plug, quarantine, secure, segregate, shut, stop, stop up, stopper, waterproof |
| Antonyms: | loosen, open, unseal |
| Main Entry: | leakproof |
| Part of Speech: | adjective |
| Definition: | watertight |
| Synonyms: | impervious, waterproof |