What are the opposite words for -y?

The suffix "-y" can be added to various words to describe a characteristic or quality. Antonyms for "-y" aren't necessarily a formal part of the English language, but they can be reversed by changing the root word. For example, "happy" can be reversed as "unhappy", "jumpy" can be changed to "calm", and "greedy" can be changed to "generous." Similarly, "stormy" can be transformed into "calm," "messy" into "tidy," and "sunny" into "gloomy". The antonym for the "-y" suffix depends on the context or adjective being described. The opposite of "-y" would be to negate the descriptor or quality of the root word.