Spanish Stress and Accent Rules

Spanish accentuation (acentuación) is a logical and strict system that determines which syllable is stressed in a spoken word and when a written accent mark (tilde) is required. Words are classified into four groups based on stress: 'agudas' (stressed on the last syllable), 'llanas' (stressed on the second-to-last syllable), 'esdrújulas' (stressed on the third-to-last), and 'sobresdrújulas'. By default, words ending in a vowel, 'n', or 's' are stressed on the second-to-last syllable, while others are stressed on the last.

If a word deviates from these natural stress patterns, a written tilde must be placed on the stressed vowel (e.g., 'café', 'árbol'). Written accents are also used to distinguish homonyms, such as 'tú' (you) and 'tu' (your). Understanding these rules is essential for all learning levels because incorrect stress can change the meaning of a word or verb tense, making correct accentuation critical for clear pronunciation and spelling.