This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Suggesting or threatening evil: a sinister smile.

adj. Presaging trouble; ominous: sinister storm clouds.

adj. Attended by or causing disaster or inauspicious circumstances.

adj. On the left side; left.

adj. Heraldry Situated on or being the side of a shield on the wearer's left and the observer's right.

adj. Inauspicious, ominous, unlucky, illegitimate (as in bar sinister).

adj. Evil or seemingly evil; indicating lurking danger or harm.

adj. Of the left side.

adj. On the left side of a shield from the wearer's standpoint, and the right side to the viewer.

adj. Wrong, as springing from indirection or obliquity; perverse; dishonest.

adj. On the left hand, or the side of the left hand; left; -- opposed to dexter, or right.

adj. Unlucky; inauspicious; disastrous; injurious; evil; -- the left being usually regarded as the unlucky side.

adj. Wrong, as springing from indirection or obliquity; perverse; dishonest; corrupt.

adj. Indicative of lurking evil or harm; boding covert danger.

Left, as opposed to right; on the left side; specifically, in heraldry, noting the left-hand side of the person who carries the shield on his arm (therefore the right-hand side of the spectator): the sinister part of the escutcheon is opposed to the dexter part (see dexter).

On or toward the left or unlucky side; hence, of ill omen; inauspicious; threatening or suggesting evil.

Bringing evil; harmful; malign; unfortunate in results.

Unpleasant; disagreeable.

Malicious; evil; base; wrong.

adj. stemming from evil characteristics or forces; wicked or dishonorable

adj. on or starting from the wearer's left

adj. threatening or foreshadowing evil or tragic developments

"Even the English word sinister comes from the Latin sinestra, which means left."

evil    sinistral    alarming    sinister chief   

dexter   

sinister canton    sinister aspect    bend sinister    sinister diagonal   

left    unlucky    inauspicious    disastrous    injurious    evil    perverse    dishonest    corrupt    harmful   

minister   

ominous    grim    unpleasant    weird    tragic    peculiar    gloomy