借
=
亻
+
昔
:
Rosa Luxemburg (亻) and Joan of Arc (ji) are enjoying milkshakes (昔) in the elevator's bathroom (e4). To let each other taste the other's milkshake, they lend (借) them each other.
to follow / from / because of / due to / by / via / through / (before a noun and a verb) it is for ... to ...
由
=
丨
+
曰
:
Mnemonic symbol: 自由古巴, a cuba libre. The character 由 itself even looks like a cuba libre.
Maud Younger (y) is taking part in a charity auction in the outhouse's kitchen (ou2). She is auctioning the dinosaur bone (丨) next to her and is speaking into a microphone (曰). In the other hand she is holding a cuba libre (由), and she is already quite drunk.