The term 'PREFIX FOR PORT' can be solved by three different crossword solutions: TRANS (5 letters), CAR (3 letters), and HELI (4 letters). TRANS stands for 'TRANSPORT' or 'TRANSPORTATION', which is a form of movement of people, animals, and goods from one location to another. CAR stands for 'CARRIER', which is a person or company that transports goods or people. HELI stands for 'HELICOPTER', which is an aircraft that uses rotors to move through the air. All three of these solutions are prefixes for the word 'PORT', which is a place where ships can dock and unload cargo.