'deliberately-maintained' originates from the combination of 'deliberately,' meaning 'intentionally,' and 'maintained,' meaning 'kept in a particular state.'

The term 'deliberately-maintained' evolved from the individual words 'deliberate' and 'maintain,' which have been used in English since the 15th century.

Initially, 'deliberate' meant 'considered carefully,' and 'maintain' meant 'to keep in existence.' The combined term retains these meanings, emphasizing intentionality in preservation.