The term CAB OPENER can be solved by the four letter word PEDI. PEDI is an abbreviation for a Pedicab Operator, which is a person who operates a three-wheeled bicycle taxi. Pedicab operators are often found in cities and tourist areas, providing transportation services to passengers. They are also known as cycle rickshaws, bike taxis, or trishaws. Pedicab operators use a CAB OPENER to open the door of the pedicab so that passengers can enter and exit the vehicle.