Mark under a consonant in French, perhaps

• Façade component
• Janet's fiancГ© in "The Rocky Horror Picture Show"
• Part of Curaçao
• Janet's fiancé in "The Rocky Horror Picture Show"
• Cousin of the tilde and umlaut
• Mark made under a 'c'
• Diacritical mark under a 'c'
• French "c" feature, maybe
• Addition to a letter

Wiktionary Word definitions in Wiktionary
n. (context orthography English) In the spelling of Catalan, French, Portuguese and some other languages, a mark sometimes placed under the letter (term: c) to indicate that it is pronounced /s/ rather than /k/, as in French ''menaçant'' and Portuguese ...