苦膽

苦 = 艹 + 古 : Karl Koala decided to repent for his sins and retreated into a cloister inside the space station. There he leads a very simple life full of hardship, e.g. he gave up on eucalyptus and just eats very bitter artificial lawn.

胆 = 旦 + 月 : Don Quixote (d) suffers from a huge moon-shaped (月) gall stone (胆), so inside of the anthill (an3) he drinks medicine from a big mug (旦). His moon gall stone is so big, it has gall stones on its own and it is drinking medicine from a mug as well.