looming
adj.adj. describing something that feels like it is about to happen soon, especially something worrying or unpleasant. It can also describe something large and dark that you see in the distance.
adj. appearing as a large, often indistinct or threatening shape; or, of an event, appearing imminent and likely to cause concern. Frequently used in participial form to describe impending deadlines, crises, or physical structures.
The deadline is looming and I need to finish my work.
With the deadline looming, the team worked through the weekend to finalize the proposal.
The looming mountains cast long shadows over the valley, creating an atmosphere of isolation that the travelers found increasingly unsettling as night fell.
Often used predicatively after linking verbs like 'be' or 'seem', or attributively before nouns like 'deadline' or 'crisis'.