The word "nudnik" refers to a person who is annoying, boring, and tiresome. The antonyms for "nudnik" would be words that relate to being charming, likable, and entertaining. Some antonyms for "nudnik" would be pleasant, delightful, amusing, and captivating. Someone who is described with these words is more likely to hold people's attention and make them happy, rather than driving them away with their behavior. People who are pleasant, delightful, and amusing usually have a positive attitude towards life and exhibit lovable qualities, which can endear them to others. Therefore, the antonyms for "nudnik" describe people who are not only attractive and pleasant but also enjoyable to be around.