Obtrude (verb)

1. To push oneself or one's ideas forward in an unwelcome or aggressive manner.
2. To thrust oneself or one's ideas upon others without being invited or welcome.

Origin:

From the latin word obtrudere, meaning "to push forward" or "to thrust upon".

Examples:

1. He obtruded himself into the conversation without being invited to join.
2. She obtruded her opinions on the matter without being asked for them.
3. He obtruded his presence on the party, despite not being invited.
4. The salesman obtruded his services, despite the customer's clear lack of interest.
5. He obtruded himself into her personal life, despite her repeated requests for him to leave her alone.