boss

The word 'boss' entered English in the mid-17th century from the Dutch word 'baas', meaning 'master'. The Dutch term itself likely originated from the Middle Dutch 'baes', which referred to a male relative or uncle, implying a figure of authority within a family. This familial term broadened in meaning to denote a master or overseer, a sense which was directly adopted into American English, particularly in the context of work and politics. The transition from a term for a familial head to a workplace supervisor illustrates a common pattern where words for kinship or social roles evolve into titles for positions of power and management.

The word 'boss' is a simplex loanword from Dutch. It does not contain separable morphemes in modern English.