Syllables, stress, and where the written accent goes
A word ending in a vowel, -n or -s is stressed on the second-to-last syllable; any other ending is stressed on the last. A written accent appears only when a word breaks that rule, which is why hablo has none and habló does.
Draft copy. Every claim needs a native-speaker check before publishing — the byline is what makes this citable, so it has to be earned.
Vowel pairs are one syllable, not two
Spanish combines vowels constantly, and a combination that includes an i or a u is a single syllable — a diphthong.
| Pair | Sounds like | Examples |
|---|---|---|
| io | “ee-oh” | idioma, adiós |
| ai | English eye | aire, bailar |
| ua | “oo-ah” | agua, cuando |
| ue | “oo-eh” | bueno, nuevo |
| au | English out | auto, restaurante |
| ei / oi | “ay” / “oy” | seis, hoy |
Two strong vowels — a, e, o — do not merge. They stay separate syllables: hé-ro-e, ma-es-tro, te-a-tro.
This matters more than it looks: counting syllables wrong means putting the stress in the wrong place, and stress is what the next section is about.
Breaking a word into syllables
A syllable is one unbroken sound, normally a consonant plus a vowel.
- di-ne-ro — three
- res-tau-ran-te — four, because au is one
- a-gua — two, because ua is one
- hé-ro-e — three, because o and e are both strong
Say each one while tapping the table once per syllable. That physical count is what makes the accent rule usable.
The two stress rules
This is the part almost nothing teaches explicitly, and it explains every written accent in the language.
1. A word ending in a vowel, -n or -s is stressed on the second-to-last syllable. 2. A word ending in any other consonant is stressed on the last syllable.
Rule 1: ca-sa, ha-blo, jo-ven, cla-ses, li-bro, cri-o-lla Rule 2: ha-blar, ciu-dad, pa-pel, fe-liz, es-pa-ñol
No accents on any of those, because each one already does what the rule says.
The accent marks the exception
A written accent appears for exactly one reason: the word breaks the rule above, so the accent says where the stress actually is.
| Word | Ends in | Rule would say | Actual stress | So |
|---|---|---|---|---|
| hablo | vowel | 2nd-last | 2nd-last | no accent |
| habló | vowel | 2nd-last | last | accent |
| joven | -n | 2nd-last | 2nd-last | no accent |
| jó-ve-nes | -s | 2nd-last | 3rd-last | accent |
| facil → fácil | -l | last | 2nd-last | accent |
| inglés | -s | 2nd-last | last | accent |
Two consequences worth having:
Anything stressed on the third-to-last syllable always carries an accent. teléfono, médico, América, música, gramática. No exceptions.
Adding a syllable can remove the accent, or add one. Inglés → ingleses (the stress is now where the rule wants it). Joven → jóvenes (the stress stayed put while the word grew).
That is why profesión loses its accent in profesiones, and why dámelo gains one when pronouns are attached — see object pronouns.
Accents that separate words
A small set of one-syllable words take an accent purely to tell them apart from a homonym. Stress is not involved.
| With accent | Without |
|---|---|
| él he | el the |
| tú you | tu your |
| mí me | mi my |
| sé I know | se (pronoun) |
| té tea | te you |
| sí yes | si if |
| más more | mas but (literary) |
And every question word takes one when it asks: ¿qué?, ¿cómo?, ¿dónde? — which is covered in the question words.
Why it is worth the twenty minutes
Three payoffs, and the third is the real one.
- You can read any new word aloud correctly, first try, with no audio.
- You can write the accent instead of guessing, which matters the moment you message anyone.
- You stop mis-hearing words. Hablo and habló are I-speak and he-spoke, and the only difference is which syllable is louder.
Practise
Where does the stress fall, and does it need an accent?
- ventana · 2. hospital · 3. examen · 4. examenes · 5. cafe (the drink) · 6. facil
→ 1 ven-ta-na, no accent · 2 hos-pi-tal, no accent · 3 e-xa-men, no accent · 4 e-xá-me-nes, accent needed · 5 ca-fé, accent needed · 6 fá-cil, accent needed.
Next
→ Greetings and the first phrases you need
Topics Pronunciation
Count the syllables, place the accent
Eight questions on syllables, the two stress rules, and the accents that mark the exceptions. Nothing here needs audio.
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1How many syllables does *restaurante* have?
Answer
four — *Res-tau-ran-te* — four, because *au* is a diphthong and counts as one syllable. Splitting *a* and *u* is what makes learners miscount.
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2Why is *héroe* three syllables while *agua* is two?
Answer
*O* and *e* are both strong vowels and stay apart, while *ua* contains a *u* and merges — A pair containing an *i* or a *u* is one syllable. Two strong vowels — a, e, o — never merge: *hé-ro-e*, *ma-es-tro*, *te-a-tro*.
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3*Ciudad* carries no written accent. Where is the stress, and why?
Answer
On the last syllable, because the word ends in a consonant that is not -n or -s — Rule 2: a word ending in any consonant other than -n or -s is stressed on the last syllable. *Ciu-dad* already does that, so no accent is needed.
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4*Hablo* and *habló* differ in:
Answer
which syllable is stressed, and therefore in meaning: I speak versus he spoke — *Ha-blo* follows the rule for words ending in a vowel; *ha-bló* breaks it, so the accent says so. Skip the accent and you have written a different tense.
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5*Joven* has no accent but *jóvenes* does. Why?
Answer
The stress stayed put while the word grew, so it is now on the third-from-last syllable — *Jo-ven* is stressed second-to-last, which the rule already gives. *Jó-ve-nes* is stressed third-from-last, and anything stressed there always carries an accent.
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6Which of these is written wrongly as it stands?
Answer
*cafe*, the drink — *Ca-fé* ends in a vowel but is stressed on the last syllable, so it breaks the rule and needs the accent. The other three already do what the rules say.
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7A word stressed on the third-to-last syllable:
Answer
always carries a written accent — *teléfono, médico, música* — No exceptions to this one. The two rules only ever predict the last or second-to-last syllable, so anything earlier has to be marked.
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8Which is right: *___ hermano es profesor* (your brother)?
Answer
Tu — *Tu* without the accent is *your*; *tú* with it is *you*. The accent here has nothing to do with stress — it only separates two words that are said the same way.