The word "unfriendliest" can be rather unpleasant to hear. Luckily, there are plenty of antonyms to choose from when trying to describe something or someone that is the opposite of unfriendly. Some of these antonyms include friendly, amiable, affable, agreeable, cordial, genial, gracious, hospitable, kind, neighborly, and sociable. Using these words can provide a sense of warmth and positivity in language, and it's always good to choose them over unpleasant or negative terms. People often feel better when they hear or read something that feels welcoming or kind, rather than harsh or uninviting.