variant of 核[he2] / to investigate
核
=
亥
+
木
:
Hamlet (h) is unpacking the presents he found under the Christmas tree (木) in the elevator's kitchen (e2). He found lots of walnuts (核), but he doesn't know whether there are kernels or stones (核) inside. Fortunately he also unpacked a boar (亥) which sniffs at the walnuts and, after the careful examination (核), tells Hamlet what's inside.