He sensed something vaguely sinister about his travel-ing companion.

There was something vaguely sinister about the dour, dark-skinned valet in his long white robes.

Here, characters dress uniformly and move robotically; everything is vaguely sinister; nothing is what it seems.

The forest beyond the wall looked impenetrable and vaguely sinister.

The effect was, in Dexter's view, unflattering and vaguely sinister, like the one produced by trick mirrors at fairgrounds.

He laughed then, soft and vaguely sinister.

His voice sounded vaguely sinister through the helmet speaker.

In fact it is the latter, stuffed, embarrassing and vaguely sinister, as a way of setting the tone for subsequent evil deeds.

It made him feel vaguely sinister amid the skeleton suits and Halloween trimmings.

Also vaguely sinister is the sound of a steady, repeated metallic thud, which can be traced to the gallery's office.