* -ist is a common suffix indicating someone who believes in or practices something, like "artist" or "socialist."
* -ity is a common suffix indicating a state or quality, like "clarity" or "sanity".
However, these suffixes don't directly relate to "thirst".
If you're looking for words related to thirst, you could consider:
* -ic as in "hydropic" (characterized by excessive fluid retention)
* -osis as in "polydipsia" (excessive thirst)
It's important to remember that suffixes are used to form new words based on existing root words. Since "thirst" itself is already a complete word, it doesn't require a suffix to modify its meaning.