penta [five]

pentagon (a figure or building having five angles and sides)

pentameter (a line of verse composed of five metrical feet)

poly [many]

polychrome (many colors)

polygon (a figure having many angles or sides)

post [after]

postscript (a note added at the end of a letter)

postwar (after a war)

pre [before]

premature (happening before the proper time)

preview (showing something before the regular showing)

pseudo [false]

pseudonym (false name)

pseudopod (false foot)

quad [four]

quadrant (one quarter of a circle)

quadruple (four times as much)

quint [five]

quintet (group of five musicians)