Portuguese · Everyday expressions

How to pronounce não sei in Portuguese

não sei

I don't know

NUHW -SEHY/ˈnɐ̃w̃ ˈsej/

Brazilian Portuguese; reference: Brazil · Choose 1.00× to hear the original pace.

não sei is pronounced /ˈnɐ̃w̃ ˈsej/ in Portuguese. In não sei: For vowels marked with a tilde, let air resonate through the nose while the mouth keeps its vowel shape. Listen to the word on its own, then compare it with the example sentence.

Practice Portuguese out loud

Speak with an AI partner · 7 days free

Find the sounds in não sei

Read não sei in these IPA segments: ˈnɐ̃w̃ · ˈsej. Dots and stress marks identify the boundaries shown in the reference; these symbols are not English spelling. The mark /ˈ/ comes immediately before the main stressed syllable. Give that syllable a little more prominence without swallowing the others.

  1. 1.Nasal resonance

    In não sei: For vowels marked with a tilde, let air resonate through the nose while the mouth keeps its vowel shape.

    Watch out: Do not add a strong n or m just because an English respelling uses one to suggest nasality.

  2. 2.A steady /e/ vowel

    In não sei: Keep the tongue toward the front and sustain a single /e/ vowel. Listen for its exact height in the recording.

    Watch out: English “ay” often ends with a glide; do not automatically carry that glide into this vowel.

  3. 3.A clear /s/

    In não sei: Let air pass through a narrow groove near the front of the mouth. Keep the sound unvoiced.

    Watch out: Do not add voicing and turn /s/ into /z/.

Hear it in context

Não sei se essa rua chega na praia.

I don’t know if this street reaches the beach.

Listen once, say it aloud, then replay at 1.00×. Keep the word connected to the surrounding sentence rather than giving every syllable equal weight.

Pronunciation and variety

The recording uses a Brazilian Portuguese voice for não sei. Portuguese in Portugal and other regions can differ in vowel reduction and consonants. The reference may list several realizations; the transcription here is selected for a Brazilian or unmarked pronunciation.

The English-style respelling is approximate. Use the IPA and recording together for vowel quality and consonants that do not have an exact English equivalent.

Meaning and everyday use

Questions about não sei

How do you pronounce não sei?

não sei is pronounced /ˈnɐ̃w̃ ˈsej/ in Portuguese. In não sei: For vowels marked with a tilde, let air resonate through the nose while the mouth keeps its vowel shape. Listen to the word on its own, then compare it with the example sentence.

What should I listen for first?

In não sei: For vowels marked with a tilde, let air resonate through the nose while the mouth keeps its vowel shape. Start at 0.75×, then return to 1.00× to hear the natural rhythm.

Ready to say it out loud?

ChatPal is a voice-first app for practicing real conversations in Portuguese. Try real scenarios and get personalized feedback on your speaking.

Start with 7 days free.