ominous

It's followed immediately by the rattle of anti-aircraft fire, the distant thud of explosions, then finally the ominous klaxon call of ambulance and fire sirens.

That could be ominous for Nvidia if Burry intends to continue his public campaign against the AI trade.

Beyond that, columns of black smoke on the horizon and ominous news broadcasts on the radio warn that the cities might not be worth returning to.

In reality, the pressure may have been going down for a far more ominous reason: At the top of the containment structure is a heavy steel lid that can be opened for reactor maintenance.

Dobbs provides an ominous warning about the eventual fate of marriage equality.