to divide / to break up / to split / to separate / to dissolve / to solve / to melt / to remove / to untie / to loosen / to open / to emancipate / to explain / to understand / to know / a solution / a dissection
解
=
刀
+
牛
+
角
:
Mnemonic symbol: acetone, in which anything can be dissolved.
Inside of the elevator (e3) Joan of Arc (ji) is dissolving a horn (角). A moment ago she cut the horn from the bull's (牛) head using a cleaver (刀). The bull is still shocked as he sees Joan of Arc dissolve (解) his horn in acetone (解).