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Drainage

//ˈdɹeɪnəd͡ʒ// noun

Noun

1
A natural or artificial means for the removal of fluids from a given area by its draining away. countable, uncountable
"It should move NR away from previous examples of repairs that have treated the symptoms (fixing the landslip) but not fixed the underlying cause (poor drainage), with the result that a second slip followed."
2
emptying something accomplished by allowing liquid to run out of it wordnet
3
A system of drains. countable, uncountable
4
A downward wind. countable, uncountable
"In the forward part of the cyclone, drainage katabasis is checked; but its highest intensity is observed in the rear part of the cyclone."

From drain + -age.

Unscramble this word: drainage