屼

兀 = 一 + 儿 : Mnemonic symbol: A 胡兀尔, a kind of Chinese fiddle with four strings, more commonly known as 四胡.

兀 = 一 + 儿 : Sun Wukong is playing his 胡兀尔 in the space station's bathroom, but he's deliberatly playing very badly in order to annoy Willy Walrus. Willy Walrus is so annoyed that he threatens to cut off Sun Wukong's feet with a flute if he doesn't stop.

山 = 丨 + 凵 : Mnemonic symbol: 山 looks like the tip of a fork. Sherlock Holmes (sh) is climbing a mountain (山) in front of the anthill (an1). He uses a dinosaur bone (〡) as walking stick, and to have better grip he attached a fork (山) to its tip. Unfortunately he accidentally sticks the fork into a receptacle (凵) on the ground of the mountain and gets shocked.