| knavish | (adjective) marked by skill in deception | Synonyms: crafty, cunning, dodgy, foxy, guileful, slick, sly, tricksy, tricky, wily |
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| naval | (adjective) connected with or belonging to or used in a navy | - |
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| navicular | (adjective) shaped like a boat | Synonyms: scaphoid |
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| navigable | (adjective) able to be sailed on or through safely | - |
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| navigational | (adjective) of or relating to navigation | - |
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| unavailable | (adjective) not available or accessible or at hand | - |
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| unavailing | (adjective) producing no result or effect | Synonyms: futile, ineffectual, meaningless, otiose |
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| unavenged | (adjective) for which vengeance has not been taken | - |
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| unavoidable | (adjective) impossible to avoid or evade | Synonyms: ineluctable, inescapable |
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| unavowed | (adjective) not openly expressed | Synonyms: sneaking |
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| (adjective) not openly made known | Synonyms: secret |
| (adjective) not affirmed or mentioned or declared | - |
| unnavigable | (adjective) incapable of being navigated | - |
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