Lesson 296: Spanish diphthongs & hiatus – Part 2

Spanish diphthongs and hiatus Part 2
(Must-see class prior to learning Spanish accents’ Rule Nbr. 2)


Today’s lesson complements the previous one. If you haven’t yet, I strongly recommend that you first watch:

Lesson 295: Spanish diphthongs and hiatus  -Part 1

Lets begin by reviewing what Spanish diphthongs and hiatus are, we need to learn that Spanish vowels are separated in 2 different categories: Strong & Weak


WEAK VOWELS:          I, U

What is a DIPHTHONG: We have a diphthong when two vowels that go together in the same word, remain together in the same syllable.

What is a HIATUS: We have a hiatus when two vowels that go together in the same word, are separated each one in a different syllable.

Lets think of vowels in this way:

When we separate a word in syllables, weak vowels cannot be separated form their partner. Why? Lets say that just because they are “weak”.

Strong vowels can be split, because they are “strong” (this is the most intuitive way of thinking of it and understanding the rules).

When do we have SPANISH DIPHTHONGS: A diphthongs applies when a word has two vowels together, and these vowels are either:

– 1 strong vowel + 1 weak vowel
– 2 weak vowels

Per the rule we just mentioned, a weak vowel cannot be split from her partner vowel. Therefore, here the vowels need to stay together in the same syllable. Thus, we have a Spanish diphthong.

When do we have a SPANISH HIATUS: A hiatus applies when a word has two vowels together, and these vowels are 2 strong vowels.

Since strong vowels can be split from their partner-vowel, then these 2 strong vowels are separated into 2 different syllables. Thus, we have a Spanish hiatus.

OBSERVATION: If the stress of the word is on a weak vowel, then this vowel behaves as a strong vowel. Thus, instead of a diphthong we may have a hiatus, because a weak vowel became “strong” (and this weak vowel therefore should carry a Spanish accent).

Examples of Spanish diphthongs:

  • higiene (hi-gie-ne) – hygiene
  • rancio (ran-cio) – rancid
  • dueño (due-ño) – owner
  • bien (bien) – well
  • cuero (cue-ro) – leather
  • abierto (a-bier-to) – open
  • camn (ca-mión) – truck
  • vidriería (vi-drie-rí-a) – glass-pane store

Examples of Spanish hiatus:

  • vidriería (vi-drie-rí-a) – glass-pane store
  • compañía  (com-pa-ñí-a) – company
  • lío (lí-o) – mess
  • teología (te-o-lo-gí-a) – theology (it has 2 hiatus)
  • maíz (ma-íz) – corn
  • mueblería (mue-ble-rí-a) – furniture shop
  • mío (mí-o) – mine (in reference to a masculine noun or person)
  • mía (mí-a) – mine (in reference to a feminine noun or person)

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