brittle / fragile / crisp / crunchy / clear and loud voice / neat
脆
=
危
+
月
:
The moon (月) is skating on the ice in the Eiffel Tower's bathroom (ei4), although there's a warning sign (危) pointing out that it is very fragile (脆). Kitty Cat (cu) tries to warn him by shouting and waving at him, but the moon is too far away.