| trespassing | (adjective) gradually intrusive without right or permission | Synonyms: encroaching, invasive |
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| unappetising | (adjective) not appetizing in appearance, aroma, or taste | Synonyms: unappetizing |
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| unceasing | (adjective) uninterrupted in time and indefinitely long continuing | Synonyms: ceaseless, constant, incessant, never-ending, perpetual, unremitting |
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| (adjective) continuing forever or indefinitely | Synonyms: aeonian, ageless, eonian, eternal, everlasting, perpetual, unending |
| uncompromising | (adjective) not making concessions | Synonyms: inflexible, sturdy |
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| uncousinly | (adjective) not befitting a cousin | - |
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| unenterprising | (adjective) lacking in enterprise; not bold or venturesome | Synonyms: nonenterprising |
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| unimposing | (adjective) lacking in impressiveness | - |
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| unpleasing | (adjective) unpleasant or disagreeable to the senses | - |
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| unprepossessing | (adjective) creating an unfavorable or neutral first impression | Synonyms: unpresentable |
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| unpromising | (adjective) unlikely to bring about favorable results or enjoyment | - |
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| unsinkable | (adjective) incapable of being sunk | - |
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| unsurprising | (adjective) not causing surprise | - |
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| unsympathising | (adjective) not showing or expressing sympathy | Synonyms: unsympathizing |
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| ursine | (adjective) of or relating to or similar to bears | - |
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