"person" radical in Chinese characters (Kangxi radical 9)
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).
to be / to act as / manage / withstand / when / during / ought / should / match equally / equal / same / obstruct / just at (a time or place) / on the spot / right / just at
当
=
小
+
彐
:
This character looks like an angry pitbull. 小 forms the eyes and maybe nose, and 彐 are the dangerous teeth.
当
=
小
+
彐
:
Don Quixote opposes a dangerous pit bull in front of the anglepod, and he tries to calm him down with a daisy.