In Spanish, a hiatus occurs when two vowels are next to each other and both are pronounced separately. A hiatus can be formed by a combination of a weak vowel with an accent (í, ú) and a strong vowel without an accent (a, e, o).
Examples of such hiatus include:
País (Country): The combination of the weak vowel "í" with the strong vowel "a" creates a hiatus in the word "país."
Ruído (Noise): The weak vowel "í" followed by the strong vowel "o" forms a hiatus in the word "ruido."
Poeta (Poet): The weak vowel "o" with an accent (ó) combined with the strong vowel "e" creates a hiatus in the word "poeta."
In these examples, the weak vowel with an accent and the strong vowel without an accent are pronounced separately, and there is a slight pause or break between them when spoken.