infidel /inˈfi-del or -dl/

1. Someone who rejects a religion, esp Christianity or Islam
2. Loosely, someone who disbelieves in a particular theory, etc

1. Unbelieving
2. Sceptical
3. Disbelieving a religion

infidelˈity noun

1. Lack of faith or belief
2. Disbelief in religion
3. Unfaithfulness, esp in marriage
4. An instance of this
5. Treachery

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• radiopaque
• radiophone
• radiophones
• radiophonic
• radiophonics
• radiophonies
• radiophonist
• radiophonists
• radiophony
• radio pill
• radio pills
• radioresistant
• radios
• radioscope
• radioscopes
• radioscopic
• radioscopically
• radioscopy
• radiosensitise
• phosphorets
• phosphoretted
• phosphoretted hydrogen
• phosphoric
• phosphoric acid