'forest-residing' originates from the combination of 'forest' and 'reside', where 'forest' refers to a large area covered chiefly with trees and undergrowth, and 'reside' means to live in a particular place.

'forest' comes from Old French 'forest', and 'reside' from Latin 'residere', meaning 'to sit back, remain'.

Initially, it meant 'living in a forest', and this meaning has largely remained the same in modern usage.