The opposite of "un tactful" is "tactful," which means expressing oneself in a subtle and polite way. Tactful individuals listen carefully to others and think before they speak, considering how their words might be interpreted or received. They choose their words and tone of speech carefully to avoid offending or insulting others. Tactful people are characterized by respect, empathy, and a willingness to compromise. Being tactful helps to build good relationships, establish trust, and avoid misunderstandings. It makes communication more effective and enjoyable. In contrast, a person who is un tactful is often viewed as rude, insensitive, and difficult to communicate with.