1. L'Accent Aigu (´) · Acute Accent
Rule: Slants upward to the right ↗. It turns the silent or neutral French e into a crisp, closed "ay" sound (like in the English word say, but clipped clean without gliding into an "-ee" diphthong). This is the hallmark of French past participles and countless nouns.
Golden Rule: The accent aigu NEVER appears before a double consonant (e.g., effort, belle, not éffort) and never before an 'x' (examen), because a double consonant already forces the 'e' sound to be heard!