zhà
=
zh
+
a4:
to burst / to explode / to blow up / (fig.) to fly into a rage
Mnemonic
As James II of England (zh) runs into the ashram's bathroom (a4) with his Mohawk (乍) on fire (火) the whole building explodes (炸) since there was a lot of methane from the previous user in the bathroom.
fire / urgent / ammunition / fiery or flaming / internal heat (Chinese medicine) / hot (popular) / classifier for military units (old) / Kangxi radical 86