This cheat sheet covers how Spanish words are stressed and when written accent marks are required. Students need these rules to pronounce words correctly, spell accurately, and understand meaning. Accent marks can change both pronunciation and word meaning, so they are important in reading, writing, and speaking Spanish.
The core rules depend on the last letter of the word and the stressed syllable. Words ending in a vowel, n, or s are usually stressed on the next-to-last syllable, while words ending in other consonants are usually stressed on the last syllable. Written accent marks show exceptions, mark esdrújula words, separate vowel sounds, and identify many question and exclamation words.
Key Facts
- If a Spanish word ends in a vowel, n, or s, the natural stress is on the next-to-last syllable, as in casa, hablan, and clases.
- If a Spanish word ends in a consonant other than n or s, the natural stress is on the last syllable, as in papel, reloj, and ciudad.
- A written accent mark is used when the word's stress does not follow the natural stress rule, as in lápiz, canción, and fácil.
- Aguda words are stressed on the last syllable and take an accent mark when they end in a vowel, n, or s, as in café, canción, and inglés.
- Llana words are stressed on the next-to-last syllable and take an accent mark when they end in a consonant other than n or s, as in árbol and azúcar.
- Esdrújula words are stressed on the third-to-last syllable and always take an accent mark, as in teléfono, música, and miércoles.
- A diphthong combines a strong vowel with a weak vowel or two weak vowels in one syllable, as in ciudad, bueno, and aire.
- Question and exclamation words usually need accent marks, as in qué, quién, cuándo, dónde, cómo, cuál, and cuánto.
Vocabulary
- Stress
- Stress is the syllable in a word that is pronounced with the most emphasis.
- Accent mark
- An accent mark is a written mark over a vowel that shows stress, separates vowel sounds, or distinguishes meanings.
- Aguda
- An aguda is a Spanish word stressed on the last syllable.
- Llana
- A llana is a Spanish word stressed on the next-to-last syllable.
- Esdrújula
- An esdrújula is a Spanish word stressed on the third-to-last syllable and always written with an accent mark.
- Diphthong
- A diphthong is two vowels pronounced together in the same syllable.
Common Mistakes to Avoid
- Putting an accent mark on every stressed word is wrong because Spanish only writes accent marks when a rule requires them.
- Forgetting accents on question words is wrong because qué, cómo, cuándo, and similar words need accents in direct and indirect questions.
- Using English stress patterns is wrong because Spanish has predictable stress rules based on the final letter and syllable position.
- Ignoring the difference between n or s and other consonants is wrong because this final letter determines the natural stress rule.
- Leaving off accents on esdrújula words is wrong because all esdrújula words must have a written accent mark.
Practice Questions
- 1 Decide whether the word papel needs an accent mark, and identify the stressed syllable.
- 2 Add the correct accent mark if needed: cancion, arbol, telefono, cafe.
- 3 Classify these 4 words as aguda, llana, or esdrújula: español, lápiz, música, casa.
- 4 Explain why sí and si are not interchangeable in Spanish, even though they look almost the same.
Understanding Accent Marks & Stress Rules
Stress is the stronger beat inside a word. In normal speech, Spanish speakers do not give every syllable equal weight. The stressed syllable is usually a little longer, clearer, and stronger.
Learning to hear that beat makes pronunciation easier before spelling rules even enter the picture. Clap or tap once for each syllable, then say the word naturally and notice the strongest clap.
For example, in computadora, the strongest beat falls on do. This listening habit helps students avoid placing English-style stress on the wrong part of a Spanish word.
Syllables matter because the spelling rule can only be applied after a word is divided correctly. A single consonant between two vowels usually begins the next syllable, as in ca-sa and pe-lo-ta. Common consonant pairs such as bl, br, cl, cr, dr, fl, fr, gl, gr, pl, pr, tl, tr, ch, ll, and rr stay together.
This gives syllables such as a-bra-zo, a-tle-ta, and pe-rro. Other nearby consonants often split apart. Careful syllable division is especially useful with longer words, since students can find the stressed syllable by counting back from the end.
Vowel combinations need close attention. The strong vowels are a, e, and o. The weak vowels are i and u.
Some vowel pairs belong to one syllable, but an accent on a weak vowel can break the pair into two syllables. In país, the accented i has its own beat, so the word has two syllables. The same happens in río, María, and oír.
This is called a hiatus. It explains accents that may seem surprising if a student only looks at the final letter.
Pronounce the vowels slowly first. If each vowel has a separate beat, check whether the weak vowel needs an accent mark.
Accent marks sometimes distinguish words that are spelled nearly the same but do different jobs in a sentence. Él means he, while el means the. Tú means you, while tu means your.
Sí can mean yes, while si can mean if.
Dé is a form of dar, while de often means of or from. These marks do not signal an unusual spoken stress pattern in every case. They help readers identify meaning quickly.
Question words keep their accents in direct questions, indirect questions, and exclamations. For example, No sé dónde vive contains an indirect question even though it has no question marks.
When writing, first decide what the word means in the sentence. Then check stress, syllables, and any meaning-based accent marks before relying on memory alone.