|Word root/ prefix||Root Meaning||Words based on the Root|
|Purg||clean||Purge - remove anything undesirable
Purgatory - according to roman Catholics a place where souls must clean themselves of sin
Expurgate - remove objectionable passages from a publication.
|Pyr/o||fire/ high temperature||Pyrotechnics - a display of fireworks
Pyrometer - a thermometer used for measuring high temperatures
Pyretic - inducing fever.
|Quad/r/ri||four/fourth||Quadrant - a circular sector equal to one-quarter of a circle/ open space with buildings on four sides
Quadrennium - a time period of four years
Quadruped - an animal with four feet.
|Quart||fourth||Quarter - one-fourth of the total
Quart - one-fourth of a gallon
Quartet - a musical composition four voices or instruments.
|Quin/t||five, fifth||Quintett - a composition for 5 voices or instruments
Quintessence - pure essence, based on the ancient philosophy that there was a fifth element that was present in all things
Quintuple - fivefold.