潛在媒介

潜 = 替 + 氵 : The Queen of Hearts (qi) emptied her water bottle (氵) and is aiming to replenish (替) it in the anthill's kitchen (an2). Secretly (潜) she fills her water bottle by submerging (潜) it in a big water-filled flower pot.

在 = 一 + 亻 + 土 : Zorro (z) and Rosa Luxemburg (亻) exist (在) in the airplane's bathroom (ai4). Rosa is in the middle of balancing a flute (一) on her head and on a pile of clay (土). Zorro uses his rapier to inscribe "Z" into the flute, so as to mark that the pronunciation of "在" begins with "z".

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).