This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
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ad. In an autonomous or self-governing manner.

In an autonomous manner; from one's own choice.

"Wieseltier basically runs the back-of-the-book autonomously, which is a setup that often leads to friction with the nominal editor of the magazine, and in the case of the Wieseltier/Sullivan situation it was especially bad for some reason."

nonautonomously    semiautonomously   

independently