to evaporate / (of cooking) to steam / torch made from hemp stalks or bamboo (old) / finely chopped firewood (old)
蒸
=
艹
+
烝
:
James II of England's (zh) second attempt at feeding the masses (烝) involves a heap of artificial lawn (艹). In front of the engine ((e)ng1) he cooks it producing a lot of steam (蒸) and making it into a stew.
to warm up / to heat up / hot (of weather) / heat / fervent
热
=
执
+
灬
:
Robinson Crusoe wants to heat himself up in the elevator's bathroom, so he burns his good-for-nothing grilling license on a grill to ignite a sizeable flame.