glower \GLOW-er (the OW is as in "cow")\ verb
Meaning: to look or stare with sullen annoyance or anger

The old man's head furrowed, deep lines slipping over one another, downward and downward, like icing slipping off a cake. He glowered at the man, who, in spite of being significantly taller, younger, and fitter, seemed to shrink beneath it. Mr Faulks had always been used to getting his way, and now could win any fight by the simplest of methods.
"I'm very sorry," the young man said. Though he was not sure why he said it, since it was Mr Faulks who had trodden so plainly on his foot.