Charles Ellicott Commentary Ezekiel 24:10

"Heap on the wood, make the fire hot, boil well the flesh, and make thick the broth, and let the bones be burned." — Ezekiel 24:10 (ASV)

Spice it well. — With Ezekiel 24:9, the second part of the application of the parable begins and is marked by great energy of description. In this verse, the meaning of the word translated “spice” is doubtful.

If this is its true meaning, the idea must be: Go on thoroughly with the cooking. However, the word is always used in connection with the preparation of compound incense or spices. It therefore seems to refer to the thoroughness of the work and, consequently, means: Boil thoroughly.

In Job 41:31 (verse 23 in the Hebrew text), its derivative is used as a simile for the raging sea. The process is to continue until all the water in the cauldron has evaporated, the flesh is consumed, and even the bones are burned.