The crossword solution for the term SUFFIX WITH 'GAB' is FEST, which is a four letter word. FEST is a suffix that is derived from the Old English word 'feste' meaning 'FEAST'. It is commonly used to form words that refer to a gathering or celebration, such as festival, festivity, and festoon. The suffix 'GAB' is often added to these words to emphasize the idea of talking or conversing, such as festivagab, festoonagab, and festivitagab.