Portuguese (Brazil) · Pronunciation Guide
poh KEH. Two separate words, and the u after the q is silent.
The weight sits on "que," and that stress is what keeps its vowel a full closed e rather than raising it. Portuguese distinguishes four spellings that all sound similar: "por que" opens a question, "porque" answers one, "por quê" ends a question, and "porquê" is a noun. Only the last two carry circumflexes, marking a stressed final syllable.
Listen: por que
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Por que você está rindo?
Why are you laughing?
Listen: Por que você está rindo?
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"Por que você está rindo?" keeps the two words separate because they open the question. "Rindo" begins with the throaty h of a word-initial r and carries a nasal in the middle, so the sentence ends on a hum after opening with a breathy rasp — two very different uses of the letter r in one sentence.
Voicing the u gives "por KWAY," which is what Spanish "por qué" encourages and what Portuguese never does before an e. The bigger problem is written: learners collapse all four spellings into one, and using "porque" to ask a question is the single most common orthographic error Brazilians themselves make.