Resentment darkened his features, giving him a sinister cast.

I had been picturing to myself a dark bearded foreigner with a swarthy aspect and a sinister cast of countenance.

Suddenly, in the wake of the call, the Colonel's words had taken on a very sinister cast indeed.

Quiniven's upswept eyebrows and facial ridges gave a sinister cast to his broad grin.

In another context the downward turn of his lips might have seemed sad; under the present circumstances it took on a sinister cast.

Caldris frowned, and his face took on a sinister cast in the pipe-light.

The upward-slanting lamplight gave it a sinister cast.

But sometimes the interviews take on a more sinister cast.

As a result, Hayter's art, which at best seems bland and at worst comically so, takes on a sinister cast.

Lovable rogues to most of their customers, he and his partners in crime took on a more sinister cast with the passing years.