'clearly-ordered' originates from the combination of 'clear' and 'order,' where 'clear' meant 'easy to perceive' and 'order' meant 'arrangement or sequence.'

'clearly-ordered' evolved from the Middle English word 'ordre,' which meant 'arrangement,' and 'clear,' which has maintained its meaning over time.

Initially, it meant 'arranged in a clear manner,' and this meaning has largely remained the same in modern usage.