The term 'not acquired' can be described by four different crossword solutions: INBORN (6 letters), INNATE (6 letters), ungot (5 letters), and INBRED (6 letters). INBORN and INNATE both refer to something that is present from birth, such as a trait or characteristic. Ungot means to not have obtained something, while INBRED refers to something that has been passed down through generations. All of these words describe something that has not been acquired, but rather is something that is already present.