Spanish · Pronunciation Guide
OH-troh, two beats — and it never takes an article, so it is never "un otro".
Two syllables: O-tro, stressed on the first, as the rule for this ending requires for a vowel-final word. All four forms keep it. What is unusual about this word is grammatical rather than rhythmic: it takes no indefinite article, so Spanish says "otro café" where English says another coffee with the article built into the word.
Listen: otro
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¿Quieres otro café?
Do you want another coffee?
Listen: ¿Quieres otro café?
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"¿Quieres otro café?" shows exactly that — no "un" before "otro", which is compulsory. "Quieres" has a silent u after the q and a stem change from "querer", giving KYEH-res. And "café" needs its accent to hold the stress on the final é against its vowel ending.
The tr cluster picks up the English "ch" quality, so the word comes out "OH-chro". Keep the t dental and the r a single forward flick. The two o vowels then get treated differently, with English gliding the first and reducing the second. But the error that native speakers notice most is "un otro" — the article is never used, and adding it marks you immediately as a learner.