sinister

IPA: sˈɪnɪstɝ

Inauspicious, ominous, unlucky, illegitimate (as in bar sinister).
Evil or seemingly evil; indicating lurking danger or harm.
(archaic) Of the left side.
(heraldry) On the left side of a shield from the wearer's standpoint, and the right side to the viewer.
(obsolete) Wrong, as springing from indirection or obliquity; perverse; dishonest.

Examples of "sinister" in Sentences

S refers to the Latin word sinister, meaning left.
Hence, the word sinister describes this other side of the human body.
Even the English word sinister comes from the Latin sinestra, which means left.
So in English 'sinister' is used for "threatening or dangerous or evil sort of things"
She has failed to check in for over three weeks, and Sylvester has become concerned that something sinister is happening in her County.
And what they're trying to point out is what they call sinister relationships between Barack Obama and controversial Chicagoans like William Ayers and like Tony Rezko.