媒介

媒 = 女 + 某 : Mahatma Gandhi (m) hired a match-maker (媒) to find a wife for him. The match-maker finally found Bessy Coleman (女), and for their wedding just inside the Eiffel Tower's kitchen (ei2) the match-maker plays "somewhere over the rainbow" on her ukulele (某) for them.

介 = 人 + 丿 + 丨 : Mnemonic symbol: 介 looks like a rocket 🚀. Neanderthal Man (人) and Joan of Arc (ji) are preparing a rocket (介) for its start. Between (介) the layers of the outer shell (介) they are stuffing bananas (丿) and dinosaur bones (丨).