只
=
八
+
口
:
Mnemonic symbol: this character looks like something (a head?) on two legs. I'll just represent it by a cuttlefish (只). James II of England (zh) has been in the space station (Ø3) as the only (只) one for too long and went mad. He thinks he's holding a mandarin (口), but he's just about to bite into merely (只) an eight ball (八). On the top of his head is a cuttlefish (只) he mistook for a hat.
tree / wood / coffin / wooden / simple / numb / one of the eight categories of ancient musical instruments 八音[ba1 yin1]
木
=
八
+
十
:
Mnemonic symbol: a Christmas tree. Malte Monkey is putting up a Christmas tree (木) in the bathroom of the space station (Ø4). He's using a cross (十) as a base to put the tree on, and decorates the tree with eight-balls (八).