'baggily' originates from English, specifically from the adjective 'baggy', which in turn comes from the noun 'bag' (Middle English 'bagge'), ultimately traced to Old Norse 'baggi' meaning 'pack' or 'bundle'.

'baggily' developed by adding the adverbial suffix '-ly' to the adjective 'baggy'. 'Baggy' was formed from Middle English 'bagge' (noun 'bag') with the adjectival suffix '-y', and 'bagge' itself comes from Old Norse 'baggi'.

Initially the root 'bag' meant 'a pack or bundle'; over time the adjective 'baggy' came to mean 'loose or roomy', and 'baggily' now means 'in a loose or roomy manner'.