(prefix indicating ordinal number, e.g. first, number two etc) / order / (old) rank in the imperial examinations / mansion / (literary) but / just
第
=
⺮
+
弓
+
丨
+
丿
:
Dorothy Gale (di) accomplished an awesome result with her composite bow (弓) in the space station's bathroom (Ø4): She shot a bamboo stick (⺮) into a banana (丿) so it was split in half, and then fired a dinosaur bone (丨) into the bamboo stick (⺮) so it was split in half as well. Dorothy is number one (第) with the bow!
(prefix indicating ordinal number, as in 第六[di4 liu4] "sixth") / (literary) grades in which successful candidates in the imperial examinations were placed / (old) residence of a high official / (literary) but; however / (literary) only; just
四
=
儿
+
囗
:
Mnemonic symbol: a four-leaved clover. Socrates (s) is working out in the bathroom of the space station (Ø4). He's lifting four (四) wooden boxes (囗), and wonders why they are so heavy. He doesn't know that inside one of the four boxes, the monkey king (儿) is hiding and secretly laughing at him - until the monkey king comes out and surprises Socrates with a four-leaved clover (四).
the four tones of Middle Chinese: level tone 平聲|平声, rising tone 上聲|上声, departing tone 去聲|去声 and entering tone 入聲|入声 / the four tones of Modern Standard Mandarin
sound / voice / tone / noise / reputation / classifier for sounds
声
=
士
+
尸
+
丨
:
Sherlock Holmes (sh) hears the terrifying sound (声) of bone (丨) on stone in front of the engine ((e)ng1), and he's sure that there must be a ghost (尸). Indeed it's only the bachelor (士) who wants to scare Sherlock.