ann, enni- definition
The Latin root word ann and its variant enn both mean âyear.â These roots are the word origin of various English vocabulary words, including ann iversary and cent enn ial.ow, even if we have a hard time remembering everything that happens during the âyear,â we can at least remember that words that have ann and enn in them have something to do with a âyear!â. 1  anniversary: the turning of a âyearâ. 2  annual: of that which happens during a âyearâ.