There have been moments during the last ten years when I have fell so portentously old, so fagged and finished, that I should have taken as a very bad joke any intimation that this present sense of juvenility was still in store for me.
Source: tatoeba (11566377)
The cold light of the moon touched every face with unnatural paleness; and the silence was unbroken and portentously profound.
Source: wiktionary
At that moment a long, scraggy individual in a checked suit poked his head into the bar, looked around portentously, whistled mysteriously to my informant, and jerked his thumb and head in the direction of the door.
Source: wiktionary
Shirky ends the story of the lost Sidekick by asking, portentously, “What happens next?”—no doubt imagining future waves of digital protesters.
Source: wiktionary