atheist Look up atheist at Dictionary.com
1570s, from Fr. athéiste (16c.), from Gk. atheos "to deny the gods, godless," from a- "without" + theos "a god" (see Thea). A slightly earlier form is represented by atheonism (1530s) which is perhaps from It. atheo "atheist."
"The existence of a world without God seems to me less absurd than the presence of a God, existing in all his perfection, creating an imperfect man in order to make him run the risk of Hell." [Armand Salacrou, "Certitudes et incertitudes," 1943]
Related: Atheistic (1630s).