Negōtiōsas of Negōtiōsus • from Negōtium from Nec + ōtium (“Not leisure”)
Thanks for the break down. This word in Latin is such a "false friend" for me because negozio (most likely negotio originally) means a shop/store in Italian and also is related to the word "negotiate" in English.
Get the Scriba app, it seems to mean carrying out business, that explains why busy and shop are related.
English "negotiate" is related to this word: