IPA: /ˈɪn.fɪ.dɛl/
KK: /ˈɪnfɪdɛl/
A person who does not believe in a particular religion or who rejects a specific religious doctrine.
In some cultures, being labeled an infidel can lead to serious consequences.
Infidel is derived from "in-" (meaning not) and "fidelis" (from Latin, meaning faithful). The term originally referred to someone who is not faithful, particularly in a religious context, indicating a person who does not believe in the prevailing faith or religion.
Think of 'not' ('in-') being combined with 'faithful' ('fidelis') to remember that an infidel is someone who is not faithful to a particular belief or religion.
No commonly confused words.