solamente / únicamentevssolo
/so-la-MEN-teh/
/SO-lo/
💡 Quick Rule
Use `solo` for 'alone' (adjective) or 'only' (adverb). Use `solamente` and `únicamente` *only* for 'only'.
If you mean 'alone', `solo` stands alone. For 'only', they're a trio.
- The accent on `sólo` (to mean 'only') is no longer required by the RAE, but many people still use it to avoid confusion with `solo` ('alone').
📊 Comparison Table
| Context | solamente / únicamente | solo | Why? |
|---|---|---|---|
| Describing a state of being | (No se usa / Not used) | Mi hermano está solo. | To mean 'alone', you must use the adjective `solo/a`. `Solamente` and `únicamente` are adverbs and cannot be used this way. |
| Specifying quantity | Solamente/Únicamente quedan dos. | Solo quedan dos. | When meaning 'only', all three are interchangeable. `Solamente` and `únicamente` can feel slightly more formal or emphatic. |
| Formal announcements | El acceso es únicamente para miembros. | El acceso es solo para miembros. | `Únicamente` is often preferred in formal or written contexts to mean 'exclusively'. `Solo` is also correct but less formal. |
| Giving a simple command | Solamente escucha. | Solo escucha. | In commands, `solo` is very common and natural. `Solamente` is also correct but can sound a bit more forceful or formal. |
✅ When to Use "solamente / únicamente" / solo
solamente / únicamente
Adverbs meaning 'only', 'just', or 'exclusively'. They are interchangeable with the adverb form of `solo`.
/so-la-MEN-teh / OO-nee-kah-men-teh/
To mean 'only' or 'just'
Solamente quiero un vaso de agua.
I only want a glass of water.
For emphasis or formality
Esta oferta es válida únicamente hoy.
This offer is valid only today.
To avoid any possible confusion
Habló solamente dos minutos.
He spoke for only two minutes.
solo
Can be an adjective meaning 'alone', or an adverb meaning 'only'.
/SO-lo/
As an adjective for 'alone'
Me gusta estar solo en casa.
I like to be alone at home.
As an adverb for 'only'
Solo tengo cinco euros.
I only have five euros.
As an adjective that must agree in gender/number
Mis hermanas viven solas.
My sisters live alone.
In the phrase 'un café solo'
Quisiera un café solo, por favor.
I'd like a black coffee (coffee alone), please.
🔄 Contrast Examples
With "solamente / únicamente":
Trabaja solamente de noche.
He only works at night.
With "solo":
Trabaja solo de noche.
He works alone at night.
The Difference: This is a classic case of ambiguity. `Solamente` clearly means 'only'. `Solo` *could* mean 'only', but it could also mean he works 'alone'. Using `solamente` removes the doubt.
With "solamente / únicamente":
Únicamente quiero la ensalada.
I exclusively want the salad (and nothing else).
With "solo":
Solo quiero la ensalada.
I just want the salad.
The Difference: Both mean 'only', but `únicamente` adds a layer of formality and exclusivity, as if to say 'don't bring me anything else'. `Solo` is more common and conversational.
🎨 Visual Comparison
A split-screen showing the difference between 'solo' (alone) and 'solamente'/'únicamente' (only).
`Solo` can mean 'alone'. `Solo`, `solamente`, and `únicamente` can all mean 'only'.
⚠️ Common Mistakes
Estoy solamente en la oficina.
Estoy solo en la oficina.
To express being 'alone', you need the adjective `solo` (or `sola`). `Solamente` is an adverb and means 'only', which doesn't fit here.
Quiero una pizza solamente con queso.
Quiero una pizza solo con queso. (o 'solamente de queso')
While technically understandable, `solo` is much more natural here. For clarity, you could also say 'una pizza solamente de queso' (a pizza of only cheese).
Mis amigas están solos.
Mis amigas están solas.
When `solo` is used as an adjective ('alone'), it must agree in gender and number with the noun it describes. 'Amigas' is feminine plural, so you need `solas`.
📚 Related Grammar
Want to understand the grammar behind this pair? Explore these lessons for a deep dive:
🏷️ Key Words
✏️ Quick Practice
Quick Quiz: Solamente vs Solo vs Únicamente
Question 1 of 3
Which word completes the sentence? 'A mi gata no le gusta estar ___.'
🏷️ Tags
Frequently Asked Questions
So, are `solo` (adverb), `solamente`, and `únicamente` perfectly interchangeable?
Mostly, yes! When you mean 'only', you can usually swap them. The main difference is style and formality. `Solo` is the most common and casual. `Solamente` is a bit more emphatic. `Únicamente` is the most formal and often implies 'exclusively'.
I've seen `sólo` with an accent. What's that about?
For a long time, the rule was to write `sólo` with an accent when it meant 'only' (adverb) to distinguish it from `solo` meaning 'alone' (adjective). However, in 2010, the Real Academia Española (RAE) decided the accent is no longer necessary. You'll still see it everywhere because many writers prefer it for clarity, but it's not technically required anymore.
Can I just always use `solamente` to mean 'only' and avoid the confusion?
Yes, that's a great strategy for beginners! Using `solamente` for 'only' and `solo/a` for 'alone' will always be correct and clear. As you get more comfortable, you'll start using the adverb `solo` naturally because it's so common in conversation.