C2 adjective /ˌdaɪəˈkrɪtɪkəl/
diacritical
diacritique
Meaning
Relating to a mark added to a letter to indicate a different pronunciation or stress.
Example
The word résumé has diacritical marks that change its meaning from resume.
Le mot 'résumé' a des marques diacritiques qui changent sa signification de 'resume'.