齿
=
止
+
凵
+
人
:
Charlie Chaplin (ch) has an aching tooth (齿), and Neanderthal Man (人) is about to help him take it out using an electrical barrier (止) in the space station (Ø3). They attached the barrier to the tooth and as Neanderthal Man will plug it into the receptacle (凵), the barrier will pull out the tooth.
龄
=
令
+
齿
:
Li Qingzhao (li) wants to enter engine, but in the kitchen ((e)ng2) she has to undergo a check first. An old codger with an imperial name tag (令) is entitled to check her teeth (齿) in order to now Qingzhao's age (龄).