four (banker's anti-fraud numeral) / unrestrained / wanton / (literary) shop
肆
=
聿
+
镸
:
Socrates' (s) beard has already grown very long (镸) and he wants to do something about it in the space station's bathroom (Ø4). Without the slightest scruple (肆) he uses a decorator's brush (聿) to paint his beard pink.