(bound form) base; foundation / (bound form) radical (chemistry) / (bound form) gay (loanword from English into Cantonese, Jyutping: gei1, followed by orthographic borrowing from Cantonese)
基
=
其
+
土
:
Joan of Arc (ji) has to repair the watchtower (其) In front of the space station (Ø1). The tower needs a new foundation (基), and because it is floating in outer space, Joan of Arc can just add some dirt (土) to its base (基) to create a new foundation.
其
=
目
+
八
:
Mnemonic symbol: the shape of 其 looks like a watchtower. The Queen of Hearts (qi) is on lookout on the watchtower (其) in the space station's kitchen (Ø2). The Eye of Providence (目) helps her to look out for intruders. They also spread some eight balls (八) for possible intruders to trip on.
土
=
十
+
一
:
Tommy Turtle (tu) wants to fix a cross (十) on a flute (一) in the space station's living room (Ø3). He uses dust and clay (土) to hold them together.
塞
=
基
+
宀
:
Socrates (s) wanted to get rid of his graduation cap (宀) and threw it in the elevator's toilet (e4), but now it is clogged (塞). He'll have to dig up the foundation (基) to clear the pipes.