衰
=
丑
+
衣
:
Sheldon Shrimp (shu) is feeling very awkward in front of the airplane (ai1). He is on a date with an ox (丑), but the oxen's kilt (衣) is so old and feeble (衰) that it is falling apart.
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).