'indoor-focused' originates from the combination of 'indoor' and 'focused', where 'indoor' refers to activities or things happening inside a building, and 'focused' means concentrated or directed attention.

'indoor' comes from the Old English 'inn' meaning 'inside' and 'door' from 'duru', while 'focused' is derived from the Latin 'focus' meaning 'hearth' or 'fireplace', symbolizing a central point.

Initially, 'focus' meant 'hearth' or 'fireplace', but over time it evolved into its current meaning of 'center of activity or interest'.