The term 'prefix with LATERAL' refers to a set of words that all begin with the same prefix and have the same suffix. The prefix is 'LATERAL, ' which means 'on the side.' The solutions for this crossword are AMBI (4 letters), TRI (3 letters), MULTI (5 letters), UNI (3 letters), DORSO (5 letters), ISO (3 letters), and EQUI (4 letters). Ambi means 'BOTH, ' TRI means 'THREE, ' multi means 'MANY, ' uni means 'ONE, ' dorso means 'BACK, ' iso means 'EQUAL, ' and equi means 'EQUAL.' All of these words describe something that is related to the concept of being on the side.