phusikos describes what is presented as fitting to the relation or creaturely condition under discussion.

In Romans, the term qualifies relations or use that the clauses contrast with an alternative; in 2 Peter, its plural neuter form occurs in a comparison involving irrational animals born for capture and destruction.

1. Relations or use set in contrast · dominant

   In Romans 1:26, the accusative singular feminine form occurs in the clause where women exchange relations for what is contrary to nature. In Romans 1:27, the same form occurs where males leave the use of the female before the verse describes their desire toward one another; the APB renders these clauses with “natural relations” and “the natural use of the female.”

   Romans 1:26Romans 1:27
2. Creaturely condition in a comparison · occasional

   In 2 Peter 2:12, the nominative plural neuter form occurs in the comparison of certain people with irrational animals, in a clause that describes them as born to be captured and destroyed. The APB presents the comparison as “like irrational animals,” but the translation does not isolate the term's specific contribution.

   2 Peter 2:12

In the Anselm Project Bible: The APB explicitly uses “natural” in Romans 1:26 and Romans 1:27. In 2 Peter 2:12 it renders the surrounding comparison with “irrational animals”; The term's individual rendering there is unclear.