Nakedise

I gained some credit by communicating that I had sometimes nakedised, under the authority and by the advice of the celebrated Dr. Franklin, who wrote with earnestness in commendation of air-baths, for so he called and esteemed the remaining naked for some hours in the early morning.

Source: wiktionary

The five children were required to spend some hours of each forenoon without any clothes on, nakedising as Mr. Newton called it, as a return to primitive innocence.

Source: wiktionary

But the children did; they were left to the tender mercy of their old Mother and were allowed to enjoy nearly a full hour of nakedising.

Source: wiktionary