The term SUFFIX FOR EXIST can be solved with two different crossword solutions: ENCE (4 letters) and ENT (3 letters). ENCE is a suffix derived from the Latin verb 'existere' meaning 'to stand out' or 'to come into being'. It is commonly used to form nouns that refer to a state of being, such as existence, subsistence, and persistence. ENT, on the other hand, is a suffix derived from the Latin verb 'ESSE' meaning 'to be'. It is commonly used to form adjectives that refer to a state of being, such as present, absent, and content.