Answer:
crudité
é is called é accent aigü in french, or e acute in english
I think you're meaning the little sign above the e, it's called accent in french
Other examples of punctuation are è, ê, ù, ô, â, à, all are called accent (more precisely accent grave, accent circonflexe)
The sign ¨ on ë or ü or ï is called tréma
These are all the sign you'll find on letter in french
There's a sign under letter: under c, the sign ç, called cédille to keep the sound s.
Apercevoir -> Aperçu, this way the sound s is kept.