'baggager' originates from English, specifically formed from the noun 'baggage' + the agentive suffix '-er', where 'baggage' originally meant 'bags, luggage'.

'baggage' entered Middle English from Old North French/Old French 'bagage' (related to 'bag'), itself from Germanic roots for 'bag'; the English agentive formation '-er' was later added to create 'baggager' meaning 'one associated with baggage'.

Initially 'baggage' meant 'packs or bags carried by travellers'; over time it came to mean 'luggage' and figuratively 'burdens'. Adding '-er' shifted the meaning to 'a person who handles or carries that baggage' (and by extension, figuratively, someone burdened by emotional baggage).