Portuguese (Brazil) · Pronunciation Guide
KWAH-troo. The qu really is "kw" here, and the final o comes out as "oo."
Stress falls on the first syllable, which is exactly what the default predicts for a word ending in -o: second-to-last syllable takes the weight. No accent mark needed. When counting aloud, Brazilians hit "KWA" hard and let the rest tumble out quickly.
Listen: quatro
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Tem quatro cadeiras aqui.
There are four chairs here.
Listen: Tem quatro cadeiras aqui.
Free browser voice. Hear it read by a real native speaker inside the LingoDrop app.
"Tem quatro cadeiras aqui" opens with "tem," a nasal "teyng" with no closing consonant, then puts "quatro" in front of a plural noun. Hear how "cadeiras aqui" links: that final s becomes a z before the vowel of "aqui," so you get "ka-DAY-ruh-zah-KEE."
The dominant error is importing the Spanish "cuatro" with its trilled or fully-rolled r and an unraised final o. The Brazilian r here is a single tap, and the o at the end is "oo." English speakers separately tend to add the puff of air after the k and t that English aspirates with; Portuguese consonants are cleaner and drier than ours.