| downhill | (adjective) sloping down rather steeply | Synonyms: declivitous, downward-sloping |
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| duckbill | (adjective) having a beak resembling that of a duck | Synonyms: duck-billed |
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| freewill | (adjective) done of your own accord | - |
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| ill | (adjective) affected by an impairment of normal physical or mental function | Synonyms: sick |
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| (adjective) distressing | - |
| (adjective) resulting in suffering or adversity | - |
| (adjective) indicating hostility or enmity | - |
| (adjective) presaging ill fortune | Synonyms: inauspicious, ominous |
| shrill | (adjective) of colors that are bright and gaudy | - |
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| (adjective) having or emitting a high-pitched and sharp tone or tones | Synonyms: sharp |
| (adjective) being sharply insistent on being heard | Synonyms: strident |
| still | (adjective) not sparkling | Synonyms: noneffervescent |
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| (adjective) used of pictures; of a single or static photograph not presented so as to create the illusion of motion; or representing objects not capable of motion | - |
| (adjective) (of a body of water) free from disturbance by heavy waves | Synonyms: placid, quiet, smooth, tranquil, unruffled |
| (adjective) marked by absence of sound | Synonyms: silent, soundless |
| (adjective) not in physical motion | Synonyms: inactive, motionless, static |
| (adjective) free from noticeable current | - |
| uphill | (adjective) sloping upward | Synonyms: acclivitous, rising |
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