"This city is the most vicious form of human exploitation that can be imagined."

"That," Data said, staring after them, "was a singularly vicious form of training."

The conflict mutated into ever more bewildering and vicious forms.

In fact, some Government land reform efforts have met a vicious form of resistance.

She slashed with her blades, but Jean's anger had him in a rare, vicious form.

In its place, it said a new and more vicious form of corruption infected minority neighborhoods in the 1980's.

But crack is the most vicious form that the species - us, that is - seems ever to have encountered.

It was a particularly vicious form of torture, with no escape but death.

Spock let go, and the feverish, vicious form of the negative captain dropped to the deck.