hole / CL:個|个[ge4] / classifier for cave dwellings
孔
=
乚
+
孑
:
Karl Koala (ku) created one 孔 cave dwelling by digging a hole (孔) into one of the engine's ((e)ng3) boulders using a shovel (乚). Unfortunately there are many mosquitoes (孑) and Karl tries to kill them using the shovel.