枯
=
古
+
木
:
Karl Koala (ku) is exploring a cloister (古) which appeared in front of the space station (Ø1). In the cloister he finds a Christmas tree (木), but it is stone old (古) and already extremely dried up (枯).
朽
=
丂
+
木
:
Marie Curie (xi) visits the outhouse (ou3) in late summer and finds an old rotten (朽) Christmas tree (木). In fact the tree is so rotten that she can't endure the smell and has to put on a breathing mask (丂).