Diazonnumi describes fastening something around oneself, whether a towel for washing or a coat before entering the sea.

The attested use describes fastening an item around oneself: a towel in the washing scene of John 13:4 and John 13:5, and a coat before entering the sea in John 21:7.

1. Fastening an item around oneself · dominant

   In John 13:4, the aorist active form occurs as he takes a towel; the APB renders the action, “he tied it around himself.” John 13:5 presents the perfect middle participle in the continuing description of the towel, while John 21:7 uses an aorist middle form as Simon Peter puts on his coat before throwing himself into the sea.

   John 13:4John 13:5John 21:7

In the Anselm Project Bible: The APB explicitly renders the John 13:4 action as “he tied it around himself” and describes the towel in John 13:5 as that “with which he was girded.” In John 21:7 it presents Simon Peter as putting on his coat.