she̅n
=
sh
+
(e)n1:
body / life / oneself / personally / one's morality and conduct / the main part of a structure or body / pregnant / classifier for sets of clothes: suit, twinset / Kangxi radical 158
Mnemonic
Mnemonic symbol: a bodysuit.
Sherlock Holmes (sh) tries on his new bodysuit (身) in front of the encampment ((e)n1). To see himself better in his hand mirror (自), he uses a banana (丿) as a selfie stick.
to use an opponent's own methods to obtain retribution (idiom, from Song dynasty neo-Confucianist Zhu Xi 朱熹[Zhu1 Xi1]); to get revenge by playing sb back at his own game / to give sb a taste of his own medicine