| nocturnal | (adjective) belonging to or active during the night | - |
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| (adjective) of or relating to or occurring in the night | - |
| nonreturnable | (adjective) that may not be returned | - |
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| overturned | (adjective) having been turned so that the bottom is no longer the bottom | Synonyms: upset, upturned |
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| returnable | (adjective) that may be returned | - |
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| returning | (adjective) tending to be turned back | Synonyms: reversive |
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| (adjective) tending to return to an earlier state | Synonyms: reverting |
| saturnine | (adjective) showing a brooding ill humor | Synonyms: dark, dour, glowering, glum, moody, morose, sour, sullen |
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| (adjective) bitter or scornful | - |
| taciturn | (adjective) habitually reserved and uncommunicative | - |
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| turned | (adjective) moved around an axis or center | - |
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| (adjective) in an unpalatable state | Synonyms: off, sour |
| turnt | (adjective) extermely excited, especially about or at a part | - |
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| unturned | (adjective) not turned | - |
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| upturned | (adjective) (used of noses) turned up at the end | Synonyms: retrousse, tip-tilted |
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| (adjective) having been turned so that the bottom is no longer the bottom | Synonyms: overturned, upset |