All 4 Uses

sinister
in
The Good Soldier
(Edited)

But the brick pink of his complexion, running perfectly level to the brick pink of his inner eyelids, gave them a curious, sinister expression—like a mosaic of blue porcelain set in pink china.
Part 1

sinister = evil, harmful, or frightening
Like one of those sinister jokes that Providence plays upon one.
Part 1 *
There is the curious coincidence of dates, but I do not know whether that is one of those sinister, as if half jocular and altogether merciless proceedings on the part of a cruel Providence that we call a coincidence.
Part 2
On the same day of the year she had married me; on that 4th she had lost Edward's love, and Bagshawe had appeared like a sinister omen—like a grin on the face of Fate.
Part 3

Definitions:

(1) (sinister)
evil or harmful; or making an evil or frightening impression
(2) (meaning too rare to warrant focus)
Much more rarely and only in very old usage, sinister can refer to the left side of something.