The Roman word for business meant not-leisure. Work was defined by what it lacked.
In Latin, negotium is a compound of nec, meaning not, and ōtium, meaning leisure.1 The word for business, work, and public affairs was literally "not-leisure." The Romans defined productive activity by its opposite, as the absence of the thing they valued more.
Otium first appeared in Latin literature around 190 BC, in a chorus from Ennius's Iphigenia, where soldiers contrasted their idleness on campaign with the business (negotium) of civilian life.2
For the Roman elite, otium was not laziness. It was time devoted to philosophy, writing, reading, contemplation, friendship, and the cultivation of the mind. Cicero defended the value of his own otium by pointing to the philosophical works he produced during periods of political inactivity.3 Seneca argued that the truly valuable life required extended periods of withdrawal from public business.
The linguistic structure encoded a hierarchy. Leisure was the named condition. Work was what happened when leisure was absent.
The Greek equivalent was askholía (ἀσχολία), meaning lack of leisure, from the same structural logic: a- (not) plus skholē (leisure). The Greek word skholē, meaning leisure, also gave English the word "school," reflecting the ancient assumption that education required freedom from labor.4
English inherited the Latin root through negotiate, negotiation, and negotiable, all carrying the sense of conducting business. The original opposition between otium and negotium is no longer visible in these words. The leisure that once defined the default condition has disappeared from the vocabulary of work.5