Spanish · Pronunciation Guide
el RREE-oh — a rolled r to open and the accent splitting the i from the o.
Two syllables, RÍ-o, and the accent forces a hiatus. A weak i beside a strong o would normally form a diphthong and give a one-syllable "rio"; the mark splits them and pins the stress on the i. The plural "ríos" keeps the accent for exactly the same reason.
Listen: el río
Free browser voice. Hear it read by a real native speaker inside the LingoDrop app.
El río pasa por la ciudad.
The river runs through the city.
Listen: El río pasa por la ciudad.
Free browser voice. Hear it read by a real native speaker inside the LingoDrop app.
"El río pasa por la ciudad" uses "por" for movement through a space. "Ciudad" fuses its iu into one glide and stresses the final syllable because it ends in d. Say "el río" and the l links into the trill, which helps get the roll started.
Two things at once: the initial r gets an English treatment that kills the trill, and the ío gets collapsed into one syllable, giving "ryo". Roll the r — or at least double-tap it — and give the i and o separate beats. The word is short enough that both errors are unmissable.