Rappel

un rappel =
1. a reminder. E.g.
un rappel amical = a friendly reminder
un dernier rappel = a final reminder
recevoir un rappel = to receive a reminder

2. A call to come back
E.g. in show business, un rappel is an encore / a curtain call
il a reçu trois rappels = he took three curtain calls
Other example: un rappel a l'ordre = a call to order

3. descendre en rappel = to rappel (for US folks), to abseil (for UK folks)