triduum /tridˈū-əm or trīˈdū-/ (esp RC)

1. A space of three days
2. A period of prayer or religious celebration lasting three days

tridˈūan adjective

Lasting three days

• firestone
• firestones
• fire-storm
• fire-storms
• firethorn
• firethorns
• fire trail
• fire trails
• firetrap
• firetraps
• fire truck
• fire trucks
• fire-tube
• fire-tubes
• fire up
• fire-walk
• fire-walker
• fire-walkers
• fire-walking
• fire-walks
• firewall
• firewalls
• fire-warden
• fire-wardens
• fire-watcher