Infidelic

[in-fi-dl, -del] /ˈɪn fɪ dl, -ˌdɛl/

noun
1.
Religion.

2.
a person who has no religious faith; unbeliever.
3.
(loosely) a person who disbelieves or doubts a particular theory, belief, creed, etc.; skeptic.
adjective
4.
not accepting a particular faith, especially Christianity or Islam; heathen.
5.
without religious faith.
6.
due to or manifesting unbelief:
infidel ideas.
7.
rejecting the Christian religion while accepting no other; not believing in the Bible or any Christian divine revelation.
8.
Also, infidelic
[in-fi-del-ik] /ˌɪn fɪˈdɛl ɪk/ (Show IPA). of, relating to, or characteristic of unbelievers or infidels.
/ˈɪnfɪdəl/
noun
1.
a person who has no religious belief; unbeliever
adjective
2.
rejecting a specific religion, esp Christianity or Islam
3.
of, characteristic of, or relating to unbelievers or unbelief

mid-15c. (adjective and noun), from Middle French infidèle, from Latin infidelis “unfaithful, not to be trusted,” later “unbelieving,” from in- “not, opposite of” (see in- (1)) + fidelis “faithful” (see fidelity). In 15c. “a non-Christian” (especially a Saracen); later “one who does not believe in religion” (1520s). Also used to translate Arabic qafir, which is from a root meaning “to disbelieve, to deny,” strictly referring to all non-Muslims but virtually synonymous with “Christian;” hence, from a Muslim or Jewish point of view, “a Christian” (1530s; see kaffir).