No inflection, not the slightest raising of the pitch of voice.

A slight raising of the awning-like upper lip served its owner well enough for a smile.

The slightest raising of the handle will cause a cut in the template.

If his hooded eyes observed a slight, startled raising of her heavy brows, he gave no sign.

Spock's only response was the slight raising of an eyebrow in consternation.

A slight raising of his black eyebrows was the only mark of surprise.

She signaled her acceptance with a slight raising of an eyebrow and let it go at that.

Pausing a beat, he punctuated his observation with a slight raising of his right eyebrow.

Neither his wife nor his father moved, except for a slight raising of the eyebrows.

Whatever question mark may have followed the sentence was a thing implied only, by a slight raising of the eyebrows.