Illumina Domine vultum tuum super nos - Lord shine his countenance upon us. (Found on a medal with the face of Jesus on it. - Thank you: Jeff S. Gepfert)
Illuminatio mea virtus - Illuminate my virtue
Imaginatio regnabimus super terram - Imagination rules the world ( Thank you: L. Lawliet )
Imagines maiorum - Statues of ancestors
Imaginis honor ad prototypum pervenit - The honor rendered to an image goes to the prototype. (Ecclesiastical term - Explains that the veneration of images is addressed not to the image itself, but the person it represents)
Imberbum sacerdotis - Sacred, with no beard (oath)
Impedio iniuriam cum possum - I prevent injustice whenever I can
Imperator - Emperor (Commander of the Army -Abbreviated as Imp.)
Imperium - Empire (Abbreviated as IMP.)
Imperium et Libertas - Empire and Liberty (Cicero)
Imperium proconsulare maius et infinitum - Empire Preconsul Major and infinite (A legal description of Caesar August's perpetual powers given by the Senate)
Implebentur campi tui fertilitate - Clouds yours fertilize fields (Motto of the Municipality of Alberto Adriani in Merida, Venezuela)
Impossibilium nulla obligatio est - The impossible can not be an oblication (Legal term - Corpus Iuris Civilis)
Imprimatur - Print (. Word that was put after Nihil obstat. Can be printed, because they are no obstacle in terms of censorship)
Imprimi potest - Permission to print
Imprimisque hominis est propria veri inquisito atque investigatio - It is the duty of man to seek the truth
Imprudencia punible - Punishable imprudence (Legal term - Actions and omissions are only punishable only when expressly provided by law)
In absentia - In absence (Legal term)
In absentia luci, tenebrae vinciunt - In absence of light, darkness prevails In acto - In the act (Legal term)
In acto - In the act
In aere aedificare - Built in the air (Augustine)
In aeternum - In eternity
In albis - In white
In alio pediculum, in te ricinum non vides - You see a louse on someone else, but not a tick on yourself. (Petronius)