A cappella – [Music] in church [style], i. e. unacompanied voices.
A priori – From what comes before.
Ad absurdum – To the point of absurdity.
Ad hoc – For this purpose.
Ad infinitum – Without limit – endlessly.
Ad nauseam – To a sickening extent.
Alma Mater – One’s old school (literally ‘bounteous mother’).
Alter ego – Other (alternative) self.
Annus horribilis – A horrible year.
Agnus Dei – Lamb of God.
Aqua pura – Pure water.
Aqua vitae – Alcoholic spirit, e. g. brandy/whisky. Literally ‘water of life’.
Ars longa, vita brevis – Skill takes time to acquire, but life is short.
Ave Maria – Hail Mary.
Carpe diem – Seize the day (More literally translated as ‘enjoy the day, pluck it when it is ripe’).
Caveat emptor – Let the buyer beware.
ergo sum – I think, therefore I am.
Corpus Christi – The body of Christ.
De facto – In fact – in reality.
Dei Gratia – By the grace of God.
E Pluribus Unum – One from many.
Et cetera (etc.) – And the rest.
Et tu, Brute – And you, Brutus.
Ex libris – ‘Out of the books’, i. e. from the library.
Gloria in excelsis deo – Glory to God in the highest.
Habeas corpus – You must have the body (in court).
In absentia – In one’s absence.
In camera – In private chamber.
In flagrante delicto – In the act of committing an offence.
In loco parentis – In the place of a parent.
In vitro – In a test tube (literally ‘in glass’).
Ipso facto – By that very fact.
Magnum opus – A great work.
Mea culpa – My fault.
Modus operandi (m. o.) – Mode of operating.
Nolens volens – Willingly or unwillingly (see also, willy-nilly).
Post partum – After childbirth.
Praemonitus, praemunitus – Forewarned is forearmed.
Prima facie – At first sight; on the face of it.
Pro bono – Without charge – for the public good.
Opus Dei – The work of God.
Quid pro quo – Something for something, i. e. a favour for a favour.
Quo vadis? – Where are you going?
Rigor mortis – The rigidity of death.
Semper fidelis – Always faithful.
Sine qua non – Indispensable.
Status quo – The current state of affairs.
Sub judice – Before a court.
Tempus fugit – Time flees.
Terra firma – Solid ground.
Urbi et orbi – To the city and to the globe.
Veni vidi vici – I came, I saw, I conquered.
Vice versa – The other way around.
Vivat Regina – Long live the queen.
Vox populi – The voice of the people.