underkeep

from The Century Dictionary.

• To keep under; subdue.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb obsolete To keep under, or in subjection; to suppress.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb transitive To keep under or in subjection; subdue; suppress.
• verb transitive To keep or maintain inadequately or below standard.
• noun An underground reserve.
• noun A keep or storage space located beneath the foundation of a structure; cellar.
• noun Any storage space or reservoir placed below another object.
• noun An underkeeper, guardian, or custodian.