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não sei

Portuguese, phrase/ˈnɐ̃w̃ ˈsej/

não sei is spelled N-Ã-O-S-E-I (6 letters). Não sei is a Portuguese phrase meaning “I don't know” (English Wiktionary, September 2026).

What does não sei mean in English?

phrase

  1. 1

    I don't know

Source: English Wiktionary, Portuguese section, dump of September 2, 2026 (CC BY-SA 4.0).

How do you pronounce não sei?

  • Brazil /ˈnɐ̃w̃ ˈsej/
  • Brazil [ˈnɐ̃ʊ̯̃ ˈseɪ̯]
  • Portugal /ˈnɐ̃w̃ ˈsɐj/

Sources: English Wiktionary, Portuguese Wiktionary (Wikcionário) (dumps of September 2, 2026 and September 1, 2026); recordings from Wikimedia Commons.

What to look up after não sei