The noun apprehension means worrying about the future, or a fear that something undesirable is going to happen.

Synonyms are foreboding, suspicion, dread, or mistrust.

The word origins from Old French (late 14th century) apreension meaning “comprehension, something learned”, ad meaning “to” plus prehendere meaning “to seize”.

It’s normal to sense a little apprehension before starting a new job.

Despite his apprehensions, he acknowledged the offer.

She felt a wave of apprehension and increased heart beat as the door unlocked.