Frombachelor +‎-wise.

bachelorwise (notcomparable)

1. In the manner of a bachelor; (as though) living alone as a single man.
   • 1891, Herman Charles Merivale, Sir Frank Thomas Marzials, John Parker Anderson,Life of W. M. Thackeray, page113:

     […] and that though he retained the house in Great Coram Street for some time longer, he only occupied it fitfully, and thatbachelorwise.

   • 1995, David Foster,Plumbum: The Ultimate Heavy Metal Experience, page38:

     He's talking to himself,bachelorwise, and scowling at the map like a preacher readingPlayboy.

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