Unsuitable means something not appropriate or not suitable for a particular purpose. Antonyms for unsuitable could include suitable, appropriate, fitting, adequate, and acceptable. Other antonyms might include applicable, becoming, fitting, and proper. Each of these words conveys a sense of appropriateness or compatibility, indicating that something is well-suited for its intended purpose. By using antonyms for unsuitable, we can convey a more positive and affirmative tone in our communication, focusing on the solutions rather than the problems. It is important to choose the right words to accurately convey the intended meaning and avoid misunderstandings.