仞

亻 = 丿 + 丨 : Mnemonic symbol: Rosa Luxemburg. She's quite radical, and her name starts with "r", just like "ren2". Also, 亻appears at the left-hand side of characters, and Rosa is a leftist as well.

Robinson Crusoe (r) and Rosa Luxemburg (亻) are having their favorite snacks in the encampment's kitchen: Rosa is eating a banana (丿) and Robinson is eating a dinosaur bone (丨).

刃 = 丶 + 刀 : Mnemonic symbol: a (double-edged) two-handed sword.

Robinson Crusoe (r) got a new double-edged sword (刃) and is practising with it in the encampment's bathroom ((e)n4). He starts with cutting his old cleaver (刀), but soon takes the challenge to cut a flying petal leaf (丶) in half.