unnerving

An unnerving feeling or situation is one that makes you feel uncomfortable, anxious, or uneasy. It's like having butterflies in your stomach.

When someone says "that movie was unnerving," they probably mean that it made them feel uneasy or on edge while watching it. This can happen when a film shows something scary, disturbing, or unsettling, like a horror movie. But it can also apply to other things, like meeting a stranger who makes you feel uncomfortable, or being in a situation where you're not sure what's going to happen next. The word "unnerving" is often used to describe experiences that leave us feeling uneasy or on our toes, and we might use it to warn others about something we think they should avoid.