刀
=
㇆
+
丿
:
Mnemonic symbol: 刀 looks like a cleaver (while 刂 looks like a kitchen knife).
Don Quixote (d) serves his good deed of the day in front of the aorta (ao1). In order to feed the people, he uses a plow (㇆) to dig up bananas (丿), and cuts them into slices with a broad cleaver (刀).
笔
=
⺮
+
毛
:
Brunhilde (bi) decided to try art for a change and constructs a brush (笔) in the space station (Ø3). She cuts off her long hair (毛) and attaches it to a bamboo stick (⺮) to make her brush (笔).