The term POWER CORD can be broken down into two crossword solutions: FLEX (4 letters) and SINEW (5 letters). A power cord is an electrical cable used to provide power to a device. FLEX is a term used to describe the ability of a material to bend or stretch without breaking. SINEW is a term used to describe a type of strong, fibrous tissue that connects muscle to bone. Together, these two terms accurately describe the strength and flexibility of a power cord.