a diphthong or to avoid what would otherwise be homonyms, although this does not happen with á, because a is a strong vowel and usually does not become a semivowel in a diphthong. See Diacritic and Acute accent for more details. Vietnamese In the Vietnamese alphabet, á is the sắc tone (high-rising tone) of a. Welsh In Welsh, word stress usually falls on the penultimate syllable, but one way of indicating stress on a final (short) vowel is through the use of the acute accent. The acute accent on a is often found in verbal nouns and borrowed words, for example, casáu "to hate", caniatáu "to allow", carafán "caravan". Character mappings See also Acute accent À References A-acute Polish letters with diacritics