The word 'voyager' is built upon the core concept of a journey. Its first element, 'voyag-', descends from the Latin 'viaticum', which originally referred to provisions or money for a journey, derived from 'via' meaning 'road' or 'way'. This term passed into Old French as 'voiage', signifying travel itself. The agent suffix '-er', of Germanic origin, was appended to create a noun denoting a person who undertakes such a journey. Thus, a voyager is literally 'one who travels a way', a meaning that has expanded from terrestrial and maritime exploration to include modern space travel.

Structure: voyag (journey) + er (agent suffix) voyag (from Old French 'voiage', meaning journey or travel, itself from Latin 'viaticum', meaning provisions for a journey); er (agent suffix from Old English '-ere', indicating a person who performs an action).