
The serious words, also known as flat words, are those that have the stressed syllable (the syllable that is pronounced with more force) in the penultimate positionThey are very common in the Spanish language and follow specific accentuation rules. Knowing these rules is essential to write correctly and avoid spelling mistakes.
When are grave words stressed?
The Serious words carry an accent when they do not end in consonants “n”, “s” o vocalOtherwise, if words end in any of these letters, they do not have an accent mark. For example, the word pencil It is divided into syllables like pencilWhen pronouncing it, the greatest stress falls on the penultimate syllable (lá), making it a paroxytone word. Since it does not end in “n”, “s”, or a vowel, It wear accent markOn the other hand, the word car, divided into syllables like carIt is also a paroxytone word because the stressed syllable is the penultimate one. However, it does not have an accent mark because it ends in a vowel (“e”).
Additional rules for accentuation of grave words
In addition to the general rules of accentuation, there are particular cases in which serious words carry an accent. For example, when a word is part of a gapA hiatus occurs when two vowels that would normally form a diphthong (that is, be pronounced together) are separated into different syllables due to the placement of an accent mark. A good example is the word auntNormally, the combination of the closed vowel “i” and the open vowel “a” would form a diphthong. However, the accent mark on the “i” breaks the diphthong, separating the vowels into different syllables, so it is stressed.
Examples of serious words with an accent

Here is a list of 10 examples of serious words that have an accent:
- González
- tree
- easy
- comic
- pencil
- cárcel
- grass
- album
- Pérez
- skilled
These words follow the rule of not ending in “n”, “s” or a vowel, so they require the accent mark to indicate the stressed syllable.
Serious words with hiatus
As we mentioned above, a hiatus can force the use of an accent mark on grave words that would not normally have one. Some examples of grave words with a hiatus are:
- aunt
- to date
- fall
- meows
- howls
The hiatus in these words arises when a stressed closed vowel (“i” or “u”) is separated from an open vowel (“a”, “e”, “o”), which forces the accent mark to be placed on the closed vowel.
Exceptions to the rules of accentuation

There are some exceptions to the rule that words ending in “n”, “s”, or a vowel do not have an accent mark. These exceptions include:
- Serious words that end in s preceded by another consonantas the biceps o records.
- The serious words that form gapas the country o fall.
- Serious words with a diacritical accent, which are used to distinguish similar words such as how (interrogative) and , the (verb).
Respecting these rules and exceptions is essential for writing correctly and precisely in Spanish, especially in formal or academic texts. As we have seen, words with stress on the penultimate syllable are a very common type of word in Spanish. However, although the general rule of accentuation is quite simple, it is important to be aware of exceptions, such as hiatuses and the diacritical mark, to write correctly.