The crossword solution for the term 'STET'S OPPOSITE' is DELE, which is a four-letter word. DELE is an abbreviation for the Latin phrase 'deleatur, ' which means 'let it be deleted.' This phrase is used to indicate that something should be removed or erased from a document. It is the opposite of the Latin phrase 'STET, ' which means 'let it stand.' Therefore, the crossword solution for 'STET'S OPPOSITE' is DELE, which is an abbreviation for the Latin phrase 'deleatur, ' meaning 'let it be deleted.'