tref, treif /trāf/ or trefa /trāˈfə/ (Judaism)

Forbidden as food, not kosher

• observational
• observationally
• observation car
• observation cars
• observation post
• observation posts
• observations
• observative
• observator
• observatories
• observators
• observatory
• observe
• observed
• observer
• observers
• observes
• observing
• observingly
• obsess
• obsessed
• obsesses
• obsessing
• obsession
• obsessional