In Spanish, “oath” is most often “juramento,” used for formal promises made aloud, especially in legal or official settings.
If you’re writing, translating, or speaking about an oath in Spanish, one word handles most cases: juramento. Still, Spanish has a few nearby terms that can sound right in one scene and wrong in another. A wedding vow isn’t a courtroom oath. A pinky promise isn’t an oath at all.
This guide shows the safest translations, how to use them in real sentences, and what Spanish speakers usually mean when they choose one term over another. You’ll also get pronunciation tips and quick checks to avoid awkward phrasing.
What “Oath” Means In English Before You Translate
In English, “oath” often means a formal promise spoken out loud, tied to duty, law, or honor. The speaker is saying, “I’m binding myself to this statement or duty,” often with a witness, a document, or a legal rule behind it.
That’s why Spanish tends to treat “oath” as a heavy word. When you mean a serious pledge, Spanish usually reaches for juramento and the verb jurar. When you mean a heartfelt promise with no legal weight, Spanish may switch to promesa.
Clue That Picks The Right Spanish Word
- If the promise has legal force or an official ceremony, start with juramento.
- If it’s personal and emotional, and no one can prosecute you for breaking it, start with promesa.
- If it’s tied to marriage, office, or loyalty, you may need a set phrase like voto or juramento de lealtad.
How To Say ‘Oath’ In Spanish In Formal Settings
For most formal contexts, translate “oath” as juramento. It works for court testimony, sworn statements, oaths of office, military oaths, and ceremonies where a person publicly binds themselves to a duty.
Pronunciation That Won’t Trip You Up
Juramento is pronounced roughly like “hoo-rah-MEN-toh.” The j is a throaty sound, like a strong “h.” Stress lands on -men-.
Common Pairings You’ll Hear
Spanish often prefers fixed pairings around oaths:
- prestar juramento = to swear an oath (common in official settings)
- jurar = to swear (the verb)
- bajo juramento = under oath
- tomar juramento = to administer an oath (said of an official who receives it)
Grammar note: juramento is masculine, so you’ll write el juramento and los juramentos. If you need “an oath,” use un juramento. In formal Spanish, writers often drop the noun and keep the verb: Juró decir la verdad. That reads normal and keeps the line tight. In quotes, keep punctuation as in source.
When you translate, aim for these set phrases instead of building a literal word-by-word sentence from English. Spanish readers expect them, and they sound natural in documents.
When “Jura” Fits And When It Sounds Off
Jura can mean “oath,” but it’s narrower and more context-dependent. You’ll see it in fixed expressions and in certain regions, sometimes as a shorter alternative to juramento. In many neutral texts, juramento stays the safest pick.
Where You’ll Meet “Jura”
- In phrases like jura de bandera (a flag oath ceremony in some countries)
- As a shorter label in headlines or signage
- As the noun tied to the verb jurar, in settings that favor brevity
If you’re unsure, choose juramento. It rarely feels wrong, while jura can feel too local or too clipped in a formal translation.
Oath Vs. Vow Vs. Promise In Spanish
English loves the word “oath” even for emotional pledges. Spanish separates the meanings more often. The choice changes the tone fast, so it’s worth getting this right.
Voto
Voto is closer to “vow,” often linked to marriage or a solemn pledge made in a ritual context. You might hear votos matrimoniales for “wedding vows.” Some religious contexts also use voto for vows taken by clergy.
Promesa
Promesa is a promise, plain and human. It can be serious, but it doesn’t automatically carry legal weight. If your English sentence means “I promise,” Spanish will usually land on prometo instead of juro.
Juramento
Juramento stays for oaths tied to sworn truth, duty, or official commitment. If a witness is speaking, a judge is present, or a document says “sworn,” juramento is your anchor.
Examples You Can Reuse In Writing And Speech
Below are clean, reusable patterns. Swap the subject or the object, and you’ll still sound natural.
Daily English “Oath” With A Formal Meaning
- “He took an oath.” → Prestó juramento.
- “She swore an oath to tell the truth.” → Juró decir la verdad.
- “That statement was made under oath.” → Esa declaración se hizo bajo juramento.
Oath Of Office And Similar Ceremonies
- “oath of office” → juramento del cargo / juramento de cargo
- “to administer the oath” → tomar juramento
- “to swear in” (a person) → tomar juramento a + person
When English Means A Strong Promise, Not A Legal Oath
- “I swear it’s true.” → Te juro que es verdad.
- “I swear I’ll be there.” → Te juro que estaré allí.
- “I made a promise.” → Hice una promesa.
Notice how Spanish uses juro in casual speech as an emotional intensifier. It’s common. Still, in formal writing, that same verb can sound stronger than you meant. Match the setting.
Table Of Spanish Options For “Oath” And Close Terms
The table below groups the most useful Spanish words and set phrases. Use it as a fast picker when you’re translating a sentence and you want the tone to land right.
| Spanish Term | Where It Fits | Plain Note |
|---|---|---|
| juramento | Court, office, sworn duty | Safest default for “oath” |
| prestar juramento | Official act of swearing | Reads clean in documents |
| bajo juramento | Sworn testimony | “Under oath” |
| tomar juramento | Administering an oath | Said of the official |
| jurar | Verb: to swear | Use with a clause: jurar que… |
| jura | Ceremony labels, shorter noun | Can feel local in neutral text |
| voto | Marriage, religious vows | Closer to “vow” than “oath” |
| promesa | Personal promise | No built-in legal weight |
| juramento de lealtad | Loyalty pledges | Common set phrase |
Common Mistakes That Make A Translation Sound Odd
Even strong Spanish learners slip on “oath” because English uses it loosely. Here are mistakes that show up in essays, subtitles, and student translations.
Mixing Up “Vows” And “Oaths”
If the source text talks about marriage vows, using juramento can sound stiff. In that case, votos or promesas may fit better, depending on the sentence.
Forcing A Literal “Make An Oath”
English often says “make an oath.” Spanish doesn’t. Prefer prestar juramento or hacer un juramento only when the surrounding sentence truly needs hacer. If you’re writing formally, prestar juramento is the cleaner pick.
Overusing “Juro” In Formal Writing
In casual Spanish, te juro is common. In a formal letter or academic paragraph, it can feel dramatic. Swap to afirmo, declaro, or aseguro when you mean a strong statement without the flavor of a sworn oath.
Missing The Preposition In “Under Oath”
“Under oath” isn’t en juramento. It’s bajo juramento. That one preposition carries the standard legal phrasing.
Choice Chart For Common Situations
Use this chart to match the English intent to the Spanish that readers expect in that setting.
| Situation | Best Spanish | Sample Line |
|---|---|---|
| Witness testimony | bajo juramento | Declaró bajo juramento. |
| Swearing into office | prestar juramento | Prestó juramento como ministra. |
| Administering the oath | tomar juramento | El juez le tomó juramento. |
| Marriage vows | votos | Intercambiaron sus votos. |
| Personal promise | promesa | Me hizo una promesa. |
| Emotional “I swear” | te juro | Te juro que no fui yo. |
| Loyalty pledge | juramento de lealtad | Hizo un juramento de lealtad. |
Sworn Statement And Affidavit Terms You’ll Run Into
Sometimes the English text doesn’t say “oath,” yet it still carries the same idea. Legal English uses “sworn statement” and “affidavit” often, and Spanish has set terms that match them well.
Declaración Jurada
Declaración jurada is a common way to say “sworn statement” and, in many contexts, “affidavit.” The idea is simple: the statement is sworn, and lying can trigger legal consequences.
Juramento As The Backbone
Even when a document title uses declaración jurada, the language inside may still refer to being under oath or swearing to tell the truth. That’s where juramento, jurar, and bajo juramento keep showing up.
Spanish Usage Differences Across Countries
Spanish is shared across many countries, so you’ll spot small shifts in labels. The good news is that juramento travels well in Spain and across Latin America.
The differences show up in ceremony names and official phrasing. Some places prefer jura in public events, while others stick to juramento. If you’re writing for a specific country, match the vocabulary used in local forms so your wording feels familiar.
When “Oath” Means A Curse Word
In older English, “oath” can mean a swear word. If that’s the sense you need, don’t translate it as juramento. Spanish would usually call that a palabrota or malas palabras.
Mini Drill To Lock It In
If you want this to stick in your head, run this small drill. It takes two minutes and works well for speaking practice.
- Say the noun: juramento.
- Say the verb: jurar.
- Say the official phrase: prestar juramento.
- Say the legal phrase: bajo juramento.
- Switch to the personal version: promesa.
- Switch to vows: votos.
Next time you see “oath,” pause and ask one question: “Is this sworn, official, or enforceable?” If yes, go with juramento or a set phrase built on it. If no, move to promesa or voto.
One Last Check Before You Submit A Translation
If you’re translating a legal form, a sworn declaration, or a court transcript, keep your Spanish consistent. Don’t bounce between juramento and promesa unless the source text clearly changes meaning.
Also watch the surrounding verbs. Spanish reads cleanest with prestar or tomar around oaths, and with hacer around promises. Matching that pattern makes your writing feel like it was drafted in Spanish, not stitched from English.
If the text will be filed with an agency or used in court, a certified translator can confirm the wording that fits the jurisdiction and the document type. That last check can save headaches.