Hyphenated noun; can function as countable or uncountable.
Their leave-taking at the airport was brief but emotional.
Leurs adieux à l'aéroport furent brefs mais émouvants.
Used attributively before another noun (e.g., “leave-taking rituals”).
d'adieuS'emploie surtout dans un registre littéraire ou soutenu. He gave a leave-taking speech before leaving the company.
Il prononça un discours d'adieu avant de quitter l'entreprise.