diacritical

/ˌdaɪəˈkrɪtɪkəl/
adjective
  1. Relating to or serving as a diacritic; used to distinguish sounds or meanings.
    • Many languages use diacritical symbols to show which syllable is stressed.
    • A diacritical dot above a letter can change its pronunciation entirely.
    • The diacritical marks in Vietnamese indicate different tones.
What does "diacritical" mean? | whatsthatwordmean | whatsthatwordmean