looming
Definitions
Appearing as a shadowy, often threatening form, especially one that is large or indistinct.
Seeming about to happen, especially in reference to an event that is unwelcome or unpleasant.
Examples
The dark clouds were looming over the horizon, signaling an approaching storm.
She felt a sense of anxiety about the looming deadline for her final project.
Synonyms
impending approaching imminent threatening forthcoming menacing near