The letter O in European Portuguese doesn't behave the way most learners expect. It shifts depending on where it sits in a word, whether it carries an accent, and whether it's stressed or unstressed. This post walks through the key sound patterns, step by step. Each sound is explained in plain terms with real examples, the crucial avó/avô distinction, and a summary table to keep it all in view.

The letter A in European Portuguese isn't just one sound. It shifts depending on stress, position, and the accent marks above it. From the wide-open A in casa to the quiet, inward unstressed version, to the resonant nasal hum of manhã... each variation tells you something about how this language actually works. This post walks through them all, one sound at a time.