Permeable, Like Pumice
This page is the CodyCross answer for the clue below from Singapore, Group 2036, Puzzle 1 (Skyscrapers).
Question is: Permeable, Like Pumice
and the answer is: POROUS
Word Meaning:
POROUS — Full of tiny pores that allow fluids or gasses to pass through.
Definitions from Wiktionary.