Buttinski is a slang term used to describe someone who interferes in other people's business or conversations without being invited or welcomed. The antonyms of buttinski are words that describe the opposite of this behavior. The first antonym is 'respectful,' which means someone who engages in polite conversation and doesn't impose their opinions on others. Another antonym is 'non-intrusive,' describing someone who respects boundaries and doesn't interfere in other people's affairs. 'Mindful' is another antonym, describing someone who is aware of their surroundings and respects other people's privacy. Lastly, 'unobtrusive' describes someone who is not obnoxious or intrusive in their behavior. Overall, these antonyms describe qualities that promote healthy social interactions and communication.