For one thing, he had a positively frightening phiz.
The explosions from the Fiat were positively frightening; the screams of the hysterical Turks terrifying.
I had offended him, and the look he gave me was positively frightening.
Jack's Rake is a difficult scramble and at one or two points positively frightening as we climbed the final yards we felt a great sense of achievement.
He noted that the encounters range from the fairly straightforward (such as encountering one bear) to the "positively frightening" (one with 876 Undead creatures).
Once out of the capital, they moved down the road with a purposefulness that was positively frightening.
This would all be worrisome in itself, but his contract makes it positively frightening.
Its positively frightening.
Mick looks up, the intensity of his glare positively frightening.
And inside had been odd protrusions that resembled stools, a table, and bed-platforms to a degree that was positively frightening.