Ex post = After the fact
Persona non grata = An unwelcome person
Ex ante = Before the fact
Carpe diem = Seize the day/of the day
A posteriori = Relating to observed facts
Dues ex machina = From Gd, Machine
Ceteris paribus = Holding all else constant
A fortiori = For a stronger reason
Habeus corpus = Of the body (a legal requirement that a defendant has a right to a jury)
A priori = Known through facts
Ante diluvian = Before the flood
Ante bellum = Before the war
Bona fida = Genuine/real
Ante meridiem = Before midday (a.m.)
Mea culpa = Through my own fault
Vice versa = The other way around
E Pluribus Unum = Out of many, one
Post meridiem = After midday (p.m.)
Veni vidi vici = I came-I saw-I conquered