furtive

Here is real, unmistakable nastiness of a fetid, furtive kind, whispered in corners after a cautious glance over the shoulder.

The handwriting clearly belonged to an unstable, conniving, furtive, shallow creep.

And it is Mark and Scott—not “Chad and Ted”—who partake of cigarettes and “furtive man-on-man action.”

Aristide suddenly bethought him of the furtive masquer of the night before.

Garnache had been all eyes for some furtive sign, some whispered word; but he had surprised neither.

The first evening we went to it, and he, unobserved, made furtive sketches of the most prominent people and the prettiest girls.

Dorothy again caught the furtive glance of the woman's evil eyes, and recoiled from it as if she had trodden upon a snake.

Twice had Le Pontois taken furtive glances at the stranger whose lined brow was so extraordinarily familiar.