flect, flex = bend

circumflex (n) to bend around or curve

deflect (v) to turn or move to one side; to bend; to swerve

flexible (adj) capable of bending without breaking

flexor (n) a muscle that bends a part of the body, such as an arm or a leg

inflection (n) the bending of a person’s voice so that it does not sound boring or within only one tone; making one’s voice go up and down

inflexible (adj) not capable of being bent without breaking

reflect (v) to bend or throw back light or heat; to fold or turn back

reflection (n) the image in a mirror that is a result of bending light when it is thrown back

reflex angle (n) an angle that is greater than 180 degrees because the angle is bent beyond the straight line

retroflex (adj) bent or turned backward