What does the word "drink" written on the coffin used by the deceased mean?

Interpretation 1 Memorial to the deceased: Memorial.

2 make it stable; Establish: establish capital | lay a foundation.

Judging from Oracle Bone Inscriptions's libation character, putting something under the jar makes it stable, and the libation character is originally a "mat".

But why does it mean sacrifice? It is estimated that it originated from the religious behavior of ancient buildings to sacrifice the foundation. The cornerstone is laid at the bottom of the pit, which is probably why it is called "the temple". In ancient times, the earthwork under the floor of a house was called "Dian". Bodies and wine offerings are also buried in the grave.