| unloaded | (adjective) (of weapons) not charged with ammunition | - |
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| unmade | (adjective) (of a bed) not having the sheets and blankets set in order | - |
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| unpersuaded | (adjective) not converted | Synonyms: unconverted |
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| unshaded | (adjective) not darkened or dimmed by shade | - |
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| (adjective) (of pictures) not having shadow represented | - |
| upgrade | (noun) the act of improving something (especially machinery) by raising it to a higher grade (as by adding or replacing components) | - |
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| (noun) hardware that provides better performance than an earlier version did | - |
| (noun) the property possessed by a slope or surface that rises | Synonyms: rise, rising slope |
| (noun) a reservation that is improved | - |
| (noun) software that provides better performance than an earlier version did | - |
| (noun) an upward slope or grade (as in a road) | Synonyms: acclivity, ascent, climb, raise, rise |
| (verb) to improve what was old or outdated | - |
| (verb) give better travel conditions to | - |
| (verb) get better travel conditions | - |
| (verb) rate higher; raise in value or esteem | - |
| (verb) give a promotion to or assign to a higher position | Synonyms: advance, elevate, kick upstairs, promote, raise |
| wade | (verb) walk (through relatively shallow water) | - |
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| wader | (noun) any of many long-legged birds that wade in water in search of food | Synonyms: wading bird |
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| waders | (noun) waterproof hip boots (sometimes extending to the chest) worn by anglers | - |
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| wrongheaded | (adjective) obstinately perverse in judgment or opinion | - |
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| wrongheadedly | (adverb) in a wrongheaded manner | - |
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| zigadene | (noun) any of various plants of the genus Zigadenus having glaucous leaves and terminal racemes of mostly white flowers; all are poisonous | Synonyms: death camas |
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