Removed from a nest; removed from a place of safety or comfort.
Mid 19th century; earliest use found in Blackwood's Magazine. From unnest + -ed.
1Of objects: not manufactured or arranged so that one fits into another.
Of abstract elements or entities: not falling within the scope of other abstract elements, especially in the same hierarchical structure.
Early 20th century; earliest use found in Annual Reports War Department. From un- + nested.