正
=
一
+
止
:
Mnemonic symbol: a stick-figure with straight lines. James II of England (zh) really has to use the engine's bathroom ((e)ng4), but there's a stick-figure (正) blocking the stalls with a barrier (止). The stick-figure measures with a flute (一) whether James is tall enough to go. James stands very straight (正) to make himself as tall as possible.
Justitia (义) and Maud Younger (y) want to fix the shower in the space station's bathroom (Ø4). Just as Justitia is about to grab the shower head with her pliers (乂) she is blinded by a petal leaf (丶) floating about and instead grabs Maud's head with her pliers. This is Maud's just punishment as she broke the shower head in the first place.