Ab Imis Fundamentis - From my deepest roots (About restoration or reconstruction)
Ab imis unguibus usque ad verticem summum - From the bottom of the toenail to the highest part of the body (Cicero - Pro Q Roscio Comoedo, 20)
Ab immemorabilis - From when there was no memory
Ab imo pectore - From my chest (Julius Caesar - Frankly - From my heart)
Ab initio - From the beginning
Ab insomne custodita dracone - Protected by a sleepless dragon
Ab integro - By whole
Ab intestato - Having made no will (Legal term)
Ab intra - From within
Ab Iove principium - Start with the most important (Virgil - Aeneid VII - Iove [Jove] is Jupiter, the father of all Roman Gods)
Ab ipso ferro - From the same iron (Fray Luis de Leon's motto)
Ab irato - By anger (Legal term - Something which is invalidated, because it was done with unreasonable anger)
Ab Ordine Libertas - From order comes freedom (Colombia's motto)
Ab ore ad aurem - From mouth to ear (whispering a secret into someone's ear)
Ab origine - From origin
Ab ovo - Since the egg (Horace - Ars poetica - Refers to the egg of Leek from which hatched Helen of Troy)
Ab ovo usque ad mala - From the egg to the apple (Horace - Satire - From appetizer to dessert - From start to finish - From soup to nuts)
Ab uno disce omnes - From one learn all (Virgil - Aeneid II )
Ab uno discit omnes - From one you know all
Ab uno discunt omnes - From one learn all
ab Urbe Condita - a.U.C. - From the founding of the city (To count years since the foundation of Rome - 753 AC - Abbreviated as a.U.C.)
Ab utraque parte - Of both parties (Legal Term - Gai Institutiones - Common property e.g. an island in the middle a river is the common property of the proprietors on both banks)
Abbas Suburranus - A Suburran Abbot (Pope Anastasius IV (1153-1154) motto, according to St. Malachy prophecies - He was born near a local named Suburra)
Aberratio ictus - Mistake in the blow (Legal term that refers in an error where the wrong person gets hurt, e.g. to shot against one person and kill someone else)
Abeunt studia in mores - Practices passionately pursued become habits (Ovid - Heroides Libri XV)