困
=
囗
+
木
:
New mnemonic symbol to avoid confusion with 夗: sleeping pills.
Karl Koala (ku) prepared a nest made out of Christmas trees (木) stuffed into a plastic enclosure (囗) in the encampment's bathroom ((e)n4). To make sure that he sleeps (困) really well he pops sleeping pills (困) before laying down in his nest.
Maud Younger used to wear a monk's cowl when leaving the space station, but when she got a royal ermine coat she gladly threw the monk's cowl out. Nowadays she uses to wave a petal leaf matching her new coat.