The Collaborative International Dictionary
Atheize
Atheize \A"the*ize\, v. t. To render atheistic or godless. [R.]
They endeavored to atheize one another.
--Berkeley.
Atheize
Atheize \A"the*ize\, v. i.
To discourse, argue, or act as an atheist. [R.] --
A"the*i`zer, n.
--Cudworth.
Wiktionary
atheize
vb. (context transitive rare English) To render atheistic.