The phrase "am tender" is a way to describe a state of being gentle, caring, and sensitive towards someone or something. However, there are several antonyms that can be used to represent the opposite of this feeling such as indifferent, insensitive, and callous. When a person is indifferent, they demonstrate a lack of concern or interest in others, while being insensitive refers to someone who is unable to understand or empathize with the feelings of others. A person who is callous is someone who is cold-hearted and indifferent to others' pain or suffering. In contrast to being tender, these antonyms represent an attitude of apathy towards others.