1. Latin Words and Expressions: All You Need to Know
Even though Latin is considered a dead language (no country officially speaks it), its
influence upon other languages makes it still important. Latin words and expressions are
present in virtually all the languages around the world, as well as on different scientific and
academic fields.
Common Latin Words Latin/Greek Numeral
Prefixes
Other Latin/Greek
Prefixes
Alibi: elsewhere
alter: another
bellum: war
bonus:good
borealis: northern
corpus:body
derma: skin
dies: day
domus: home/house
ego: I/me
erectus: upright
gens: family
homo: human
malus: bad
magnus: great
nemo: nobody
omnis: everything
pax: peace
primus: first
qui: who
rex: king
sapiens: wise
terra: earth
tempus: time
virtus: virtue
vivo: live
vox: voice
semi: half
uni: one
duo, bi: two
tri, tris: three
quadri, tetra: four
penta: five
hexa: six
hepta: seven
octo:eight
ennea: nine
deca: ten
ad: towards
ambi: both
endo: within
extra: in addition
to
exo: outside
hyper: over
hypo: under
infra: below
inter: between
intro: within
iso: equal
liber: free
macro: large
micro: small
mono: single
multi: many
omni: all
proto:first
poli: many
tele: distant
trans: across
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2. General Latin Expressions
a priori: from the former. If you think something a priori, you are conceiving it
before seeing the facts. Presupposing.
ad hoc: to this. Ad hoc refers to something that was creating for a specific purpose
or situation. An ad hoc political committee, for instance, is formed for one specific
case.
ad infinitum: to infinity. Something that goes ad infinitum keeps going forever. You
could say that your wife hassles you ad infinitum, for example.
ad valorem: to the value. This expressed is used when something is related to the
value of an object or transaction, like an ad valorem tax which is proportional to
the value of the product.
ceteris paribus: other things being equal. This expressions if often used in
economics where, in order to impact of something on the economy (e.g., inflation
or unemployment), you need to hold other variables fixed.
de facto: common in practice, but not established by law. For example, English is
the de facto official language of the United States.
honoris causa: for the sake of the honour: This is an honorary degree where an
academic institution grants a doctorate to someone without the formal requirements
(exams and the like). Usually the person receiving the degree has connections with
the University or has made important achievements in a certain field.
in toto: entirely.
mutatis mutandis: with necessary changes. This expression is used to express
agreement to something that, however, still need to be changed or amended.
per se: by itself. If something exists per se, for instance, it exists by itself,
regardless of external factors.
sic: thus. Sic is usually used in newspapers or other publications (placed within
square brackets [sic]) to indicate that the spelling error or unusual phrase on a
quotation was reproduced as it was in the source, and therefore it is not an
editorial error.
vice versa: the other way around. If you write “John loves Mary, and vice versa,” it
means that Mary also loves John.
Q.E.D. (Quod erat demonstrandum): which was to be demonstrated. This Latin
abbreviation is often used at the end of mathematical theorems in order to
demonstrate that proof is complete.
3. Legal Latin Expressions
bona fide: good faith. In contract law, for instance, parties must always act in good
faith if they are to respect the obligations.
de jure: by law. Some states are currently working on legislation that would make
English the de jure official language of the United States.
dictum (plural dicta): a statement that forms part of the judgment of a court.
obiter dicta: a judge’s opinion offered in the course of a judgment but having no
legal force.
ex parte: from, by, or for one party in a dispute. An ex parte decision is one
decided by a judge without requiring all of the parties to the controversy to be
present.
habeas corpus: (we command that) you bring forth the body. In this case, the
“body” (corpus) refers to a living person who is being held in prison. The phrase
has nothing to do with producing the corpse of an allegedly-murdered person.
ipso facto: by the fact itself. Parents who have deliberately mistreated their child
are ipso facto unfit custodians.
mens rea: guilty mind. The U.S. legal system requires that when a crime is
committed, the perpetrator must have the intention to commit the crime. For
example, a driver who strikes and kills a pedestrian because of faulty brakes is
guilty of manslaughter, but not of murder. There was no intent to kill so the mind
was not guilty. On the other hand, the wife who repeatedly runs over her husband
with her SUV is guilty of murder because of her mens rea.
pro bono: (the original phrase is pro bono publico) for the public good. Sometimes
high-priced lawyers come forward to defend suspects who would otherwise have to
take their chances with someone from the Public Defender’s office. They work on
the case pro bono, i.e., they don’t charge a fee.
prima facie: by first instance – this refers cases with sufficient evidence to warrant
going forward with an arraignment.
quid pro quo: something for something. For example, the ADAs (assistant district
attorneys) make deals with criminals, giving them shorter sentences in exchange for
information that will enable them to convict other criminals. Another example of quid
pro quo might occur between two lawyers, each of whom gives up some advantage
to gain another.
Famous Latin Phrases
divide et impera: Divide and reign. It was a theory proposed by Niccolò Machiavelli
and used previously by the Roman Senate to dominate the Mediterranean.
4. alea jacta est: the die is cast: This famous phrase was said by Julius Caesar
upon crossing the Rubicon. Caesar was violating a law of the Roman Empire,
hence why he was playing with luck.
veni vidi vici: I came, I saw, I conquered. Another phrase said by Julius Caesar,
this time upon the victory over Pharnaces, king of Pontus.
cogito ergo sum: I think, therefore I am. This phrase was originally said in French
by René Descartes, and it represents a corner-stone of the Western philosophy.
The Latin translation is more widely used, though.
carpe diem: seize the day. This phrase comes from a poem by Horace. The
phrase was made famous when it was used on the movie Dead Poets Society.
deus ex machina: God out of a machine. In ancient Greece when a plot was
complicated or tangled, the play writers would just insert a God in the final act in
order to solve all the problems. Usually a crane machine was used to drop the
actor on stage, hence the name.
homo homini lupus: man is a wolf to men. This phrase was originally said by
Plauto, but other philosophers also used it, including Bacon and Hobbes. The
meaning is quite straight forward.