ferial /fēˈri-əl/

1. Relating to holidays
2. Belonging to any day of the week which is neither a fast nor a festival (RC)

• exterminating
• extermination
• exterminations
• exterminative
• exterminator
• exterminators
• exterminatory
• extermine
• extermined
• extermines
• extermining
• extern
• external
• external-combustion engine
• external-combustion engines
• external degree
• external examination
• external examinations
• external examiner
• external examiners
• externalisation
• externalise
• externalised
• externalises
• externalising