From inter- +‎ Latin mūrus (“wall”).

intermure (third-person singular simple present intermures, present participle intermuring, simple past and past participle intermured)

1. (transitive, obsolete) To wall in.

• “intermure”, in Collins English Dictionary, 2011–present.
• “intermure”, in OED Online 👁 Paid subscription required
  ⁠, Oxford: Oxford University Press, launched 2000.
• “intermure”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.