infidel

First attested 1460, from Middle French infidèle, from Latin īnfidēlis (“unfaithful”), from in- (“not”) + fidēlis (“faithful”). See fidelity.

• IPA^(key): /ˈɪn.fə.dl̩/, /ˈɪn.fə.ˌdɛl/

infidel (plural infidels)

1. (now usually derogatory) One who does not believe in a certain religion.
   • Vicesimus Knox

     The infidel writer is a great enemy to society.

   • 2005, George W. Braswell, Islam and America: Answers to the 31 Most-asked Questions (page 33)

     Some Muslims are taught that non-Muslims are infidels and are to be shunned.

2. (now usually derogatory) One who does not believe in a certain principle.
3. (now usually derogatory) One with no religious beliefs.

• unbeliever
• nonbeliever, non-believer
• disbeliever
• (one with no religious beliefs): atheist

• fidelity

• infield, infiled

From Latin īnfidēlis (“unfaithful”).

infidel (masculine and feminine plural infidels)

1. unfaithful

• fidel

infidel m or f (plural infidels)

1. infidel