The term 'MAKE A DECLARATION' can be solved by the four-letter word 'AVER'. To AVER is to state or declare positively and confidently, often in a formal or official manner. It is derived from the Latin verb 'averare', which means 'to make firm'. Averring is often used in legal contexts, such as when a witness makes a statement under oath. It can also be used in everyday speech to emphasize the strength of a statement.