The antonyms for the word "in-felicitous" are many, and they include appropriate, suitable, felicitous, fortunate, successful, happy, pleasing, auspicious, propitious, and thriving. These words refer to a situation that is characterized by joy, prosperity, and success. They are used to describe events, moments, or circumstances that bring happiness and good fortune. In-felicitous, on the other hand, refers to an unfortunate situation or an action that is poorly timed, inappropriate, or insensitive. These antonyms are important because they help people to communicate effectively and express their feelings and views about different situations. It is essential to use the right word at the right time to avoid confusion or misunderstandings.