Pinyin "hui4"

贿 = 有 + 贝 : In the Eiffel Tower's bathroom (ei4) Helga Horse (hu) is bribing (贿) the crab (贝) with its favorite food, confetti (有).

秽 = 禾 + 岁 : In the end, after many years of age (岁) everything ends up as dust (秽). This is what Helga Horse (hu) realizes in the Eiffel Tower's bathroom (ei4) after she left a bowl of cereals (禾) for several years (岁) and the cereals turned to dirt (秽).

汇 = 匚 + 氵 : Helga Horse (hu) brought a collection (汇) of water bottles (氵) and a metal box (匚) to the Eiffel Tower's bathroom (ei4). Each bottle contains water from a different river. Finally the moment she's been waiting for arrives: As she empties each bottle into the metal box, she converges (汇) the water of all these rivers at once.

讳 = 讠 + 韦 : For Helga Horse (hu) soft leather gloves (韦) are a big taboo (讳), so she sets up an advertising column (讠) in the Eiffel Tower's bathroom (ei4) with an image of crossed-out leather gloves to tell everyone that they should not talk about it.