glowering
1. [ adjective ] showing a brooding ill humor
Synonyms: sullen morose moody dour saturnine sour glum dark
Examples:

"a dark scowl" "the proverbially dour New England Puritan" "a glum, hopeless shrug" "in moody silence" "a morose and unsociable manner" "a saturnine, almost misanthropic young genius"- Bruce Bliven "a sour temper"

Related terms: ill-natured
Similar spelling:   gloweringly
  glaring
  glaringly