The little hook ¸ added under the letter c in French is a diacritical mark known as a cedilla, une cédille. The letter c with the hook ç is called c cédille. The sole purpose of the cedilla is to change a hard c, pronounced [k], to a soft c, pronounced [s].
What words have a cedilla?
Ç: Cedille: French (cé cédille). Examples: français "French", garçon "boy", façade "frontage", grinçant "squeaking", leçon "lesson", reçu "received" (past participle). French uses this character at the beginning of a word (ça "that"), but not at the end.
What does the word cedilla mean?
: the diacritical mark ¸ placed under a letter (such as ç in French) to indicate an alteration or modification of its usual phonetic value (as in the French word façade)