Meanings
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Simplified etymology
Rover entered Middle English from a form of the same ancient Germanic word family as rob, whose underlying sense was “booty.” Despite its modern association with rove, the verb rove has a separate origin.
Etymology
From rove + the agent suffix -er, with older links to Middle Dutch roven ('rob'). The word first named a wanderer or raider and could also mean a pirate vessel. Modern engineering extended the roaming idea to mobile machines that explore planets and other inaccessible places.