To be in charge of someone; to act as a boss to someone.
From 'be-' plus 'boss,' which comes from Dutch 'baas' (master). The prefix suggests placing someone in a position of authority or mastery.
This word shows how the 'be-' prefix could work with social roles—you could 'beboss' someone just as you could 'befriend' them, treating verbs of social position as something you actively do to others.
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