fornicor
From LSJ
κακὸς μὲν γὰρ ἑκὼν οὐδείς → no one is voluntarily wicked, no one is voluntarily bad
Latin > English (Lewis & Short)
fornĭcor: ātus, 1,
I v. dep. n. [id. II.], to commit whoredom or fornication (eccl. Lat.), Tert. Pudic. 22; Vulg. Gen. 38, 24 et saep.