œil-de-bœuf /œ-ē-də-bœfˈ/

1. A small round window
2. An octagonal vestibule at the court of Versailles, hence one elsewhere

• verligte
• understeer
• understeers
• understock
• understocked
• understocking
• understocks
• understood
• understorey
• understoreys
• understories
• understory
• understrapper
• understrappers
• understrapping
• understrata
• understratum
• understudied
• understudies
• understudy
• understudying
• undersubscribed
• undersupplies
• undersupply
• undersurface