The antonyms for the word "more ungenial" can vary depending on the context. However, some possible antonyms could include "amiable," "friendly," "cordial," "affable," "kind," "benevolent," "pleasant," "genial," and "welcoming." These words convey an entirely different meaning than "more ungenial," which implies unfriendliness, coldness, and hostility. Using antonyms can be helpful in developing a well-rounded vocabulary, and it can help to differentiate between different shades of meaning. Being able to use antonyms effectively can also help in communication, making it easier to express yourself and convey your intended message accurately.