"Underdrain" is a word in ENGLISH

underdrain ENGLISH
Definition:

An underground drain or trench with openings through
which the water may percolate from the soil or ground above.

underdrain ENGLISH
Definition:

To drain by forming an underdrain or underdrains in;
as, to underdrain land.

Few words of positivity

Every word the right one and exactly where it should be. That's basically the highest compliment I can give.

Gabrielle Zevin, The Storied Life of A.J. Fikry

WORD SUGGESTIONS
Laugh your heart out.

What would you get if you crossed King Kong with a skunk? I don't know but it could always get a seat on a bus!

underditch ENGLISH

To dig an underground ditches in, so as to drain the surface; to underdrain; as, to underditch a field or …

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