Legal English is a time capsule. Beneath its formal surface lie Latin from Roman law, Anglo-Norman French from 1066, Old English, and Old Norse. Knowing what the words originally meant is part of reading the law for yourself.
Old French cour — an enclosed yard
The “king's court” was first a literal enclosed courtyard where the monarch sat to settle disputes with his inner circle.
Latin iudex — ius (law) + dicere (to speak)
Literally “one who speaks the law.”
Old French jurer / Latin iurare — to swear an oath
A body of people sworn by oath to find the truth.
Latin verus (true) + dictum (saying)
To return a verdict is to “speak the truth.”
Latin alibi — elsewhere
To offer an alibi is to show you were literally “somewhere else.”
Old English hieran — to perceive sound
A formal occasion for the court to listen — exactly what it sounds like.
Anglo-French trier — to pick out, sift, choose
A sifting of evidence to separate truth from falsehood.
Anglo-French court shorthand, 1670s
By legal tradition, from clerks' abbreviation cul. prit (for culpable, prest…, “guilty, ready [to prove it]”), later misread aloud as a word for the accused. Commonly told, but not firmly proven.
Latin constitutio — an established order, decree
Historically a decree handed down by a ruler. “We the People” inverts it — the people become the authority establishing the order.
Latin prae (before) + ambulare (to walk)
The statement that “walks ahead” of the law to declare its intent.
Latin com- (together) + gradi (to step)
A “stepping together” — a coming-together into one body.
Latin prae (before) + sedere (to sit)
Originally just “one who sits in front” of a meeting to keep order.
Latin emendare — to free from fault (menda, a blemish)
Not merely an addition — etymologically, the correcting of a flaw.
Latin veto — “I forbid”
The word Roman tribunes used to block a measure outright.
Latin infringere — to break in pieces, shatter
“Shall not be infringed” carries, at the root, the image of a right that cannot be broken apart.
Old (North) French warant — a protector, a guarantee
Kin to guarantee; at root a pledge or assurance rather than a mere authorization.
Anglo-French jeu parti — a divided (even) game
A term from chess and wagering for a position so evenly balanced the next move could ruin you.
Old French bailler (to hand over) / Latin bajulare (to carry a burden)
To post bail is to “hand over” a security into the court's keeping.
Latin — “you shall have the body”
A command to a jailer: produce the physical prisoner and justify the detention. It treats liberty as a body that cannot be hidden away.
Latin — “guilty mind”
From the maxim Actus non facit reum nisi mens sit rea — “the act does not make one guilty unless the mind is also guilty.” The physical act is actus reus.
Latin sub (under) + poena (penalty)
A command to appear “under penalty” — poena is also the root of pain and penalty.
Medieval Latin — “he has pledged his faith”
To swear an affidavit is, at root, to stake one's faith on the truth of the statement.
Latin assilire — ad- (to) + salire (to leap)
At root, “to leap upon” — the image of springing at someone.
Old French felonie — wickedness, treachery
In feudal law a felon was a traitor to the oath of loyalty. The word's deeper origin is genuinely uncertain — several theories compete (the once-popular “bitterness/gall” idea is only one, and not established).
Latin latrocinium, from latro — a mercenary, then a bandit
Hired soldiers between wars often turned to robbing travelers, and the word for “soldier” drifted into the word for theft.
Old French atorner — to assign, turn over to
“One turned to” — appointed to act in another's place. An attorney-in-fact historically needn't be a lawyer at all.
English courtroom bar — the railing
A railing once separated the court's officers from the public; to argue before the judge, a student was “called to the bar” — crossing it. This is why lawyers still pass the Bar Exam and join a Bar Association, long after the rails themselves are gone.
Latin caveola — a little cage (kin to cage)
The cage itself.
Latin prensio — the act of seizing
Not the cage but the seizing — the system that takes you.
Latin in- (into) + carcer (an enclosed prison)
The Roman Carcer was a notorious underground cell for state prisoners awaiting execution.
A few everyday words carry unexpected histories once they enter the law.
Latin persona — an actor's mask
In Roman theater a persona was the mask an actor wore; the sense moved from mask → the role played → the individual. The once-common claim that persona comes from per- + sonare (“to sound through” the mask) is doubted by etymologists — the vowel length doesn't fit, and the word may be Etruscan (phersu, “mask”). A good reminder that a tidy word-story isn't always the true one.
Latin populus — the citizenry, the body of citizens
In Rome, the collective citizens with political standing — the root of popular and population.
Latin residere — re- (back) + sedere (to sit)
The place where you “sit back down” and settle — kin to sedentary and sedative.
Old Norse lagu — “that which is laid down”
Not Latin or French but Norse — a rule firmly laid down for the community, kin to lay (to set down).