Un-sentimental is a term that connotes the lacking of emotion or feeling, pragmatic or realistic in their approach to things. The antonyms for the word un-sentimental may include words such as emotional, sensitive, romantic, affectionate, sentimental, or idealistic. Emotional individuals tend to be swayed by their feelings, while sensitive people are characterized by their capacity to recognize and empathize with others' emotions. Romantic or affectionate individuals are passionate and tender-hearted, while sentimental people are often nostalgic and expressive of their feelings. Idealistic individuals are optimistic and hopeful while being unbounded by the practicalities of reality. Overall, these antonyms provide us with a range of contrasting characterizations to describe individuals who have a strong emotional inclination.