Unaffable is an adjective that refers to someone who is rude, unfriendly or hostile in their behavior. Some common antonyms of unaffable are amiable, friendly, sociable, approachable, and affable itself. Amiable refers to someone who is friendly and pleasant in disposition. A friendly person is someone who is warm and cordial towards others. Sociable people are those who enjoy being around others and are easy to talk to. An approachable person is easily understood or dealt with. An affable person is someone who is easy to talk to, courteous, and likable. All these antonyms of unaffable are the opposite of someone who is rude and unfriendly.