| SINISTER | • sinister adj. Inauspicious, ominous, unlucky, illegitimate (as in bar sinister). • sinister adj. Evil or seemingly evil; indicating lurking danger or harm.
 • sinister adj. (Archaic) Of the left side.
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| SINISTRAL | • sinistral adj. Of, facing, or on the left side. • sinistral adj. Left-handed.
 • sinistral adj. (Zoology, of certain spiral shells) Having the whorls of the spire revolving or rising to the left; reversed.
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| SINISTERLY | • sinisterly adv. In a sinister manner. • SINISTER adv. threatening or portending evil, also SINISTROUS.
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| SINISTRALS | • sinistrals n. Plural of sinistral. • SINISTRAL n. a left-handed person.
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| SINISTROUS | • sinistrous adj. (Archaic) On the left side; inclined to the left; sinistral. • sinistrous adj. (Archaic) wrong; absurd; perverse.
 • SINISTROUS adj. inauspicious, sinister, also SINISTER.
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| SINISTERITY | • SINISTERITY n. left-handedness. | 
| SINISTRALLY | • sinistrally adv. Toward the left; in a sinistral manner. • SINISTRAL adv. of or pertaining to the left, as opposed to dextral.
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| SINISTRORSE | • sinistrorse adj. Turning to the left (of the observer) in the ascending line. • SINISTRORSE adj. rising spirally and turning from right to left.
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| SINISTERNESS | • sinisterness n. The state or condition of being sinister. • SINISTERNESS n. the state of being sinister.
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| SINISTERWISE | • sinisterwise adj. (Heraldry, archaic) sinister; on the left-hand side from the wearer’s viewpoint. • SINISTERWISE adv. in left-handed fashion.
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| SINISTRALITY | • sinistrality n. Left-handedness. • SINISTRALITY n. the state of being sinistral.
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| SINISTRORSAL | • sinistrorsal adj. Rising spirally from right to left (of the observer); sinistrorse. • SINISTRORSAL adj. of a climbing plant, rising helically and turning to the right.
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| SINISTROUSLY | • sinistrously adv. In a sinistrous manner; perversely; wrongly; unluckily. • sinistrously adv. With a tendency to use the left hand.
 • SINISTROUS adv. inauspicious, sinister, also SINISTER.
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| SINISTERITIES | • SINISTERITY n. left-handedness. | 
| SINISTRORSELY | • sinistrorsely adv. In a sinistrorse manner. • SINISTRORSE adv. rising spirally and turning from right to left.
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| SINISTERNESSES | • SINISTERNESS n. the state of being sinister. | 
| SINISTRALITIES | • SINISTRALITY n. the state of being sinistral. | 
| SINISTRORSALLY | • SINISTRORSAL adv. of a climbing plant, rising helically and turning to the right. | 
| SINISTRODEXTRAL | • sinistrodextral adj. Moving or directed from the left to the right. • SINISTRODEXTRAL adj. going or directed from left to right, as a sinistrodextral script.
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