handle or shaft (of an axe etc) / (of a flower, leaf or fruit) stem / sth that affords an advantage to an opponent / classifier for knives or blades
柄
=
木
+
丙
:
Brunhilde (bi) wins a bronze medal (丙) for controlling the engine in its living room ((e)ng3) by using a self-built controller (柄) featuring the stems of two Christmas trees (木) as handles (柄).