Intrude

Pro Tip 1/3

Used when someone is where they're not supposed to be, often making others uncomfortable.

He seemed to intrude at the party, standing awkwardly alone.

Pro Tip 2/3

Highlights the absence of an invitation or right to join a situation or conversation.

I felt like I'd intrude if I joined their dinner uninvited.

Pro Tip 3/3

Often applicable in situations requiring tact or discretion to avoid offending others.

I didn't want to intrude with my questions during their mourning.