Summary: The Latin root word *ann* and its variant *enn* both mean "year." These roots are the word origin of various English vocabulary words, including [*ann*]iversary and cent[*enn*]ial. The roots *ann* and *enn* are easily remembered through the words [*ann*]iversary, which is the turning of another "year," and mill[*enn*]ium, a period of 1000 "years."
