v. t. To prop from beneath; to put a prop under; to support; to uphold. [ 1913 Webster ]

Underprop the head that bears the crown. Fenton. [ 1913 Webster ]

a. Of inadequate or inferior proportions; small; poor. [ 1913 Webster ]

Scanty and underproportioned returns of civility. Collier. [ 1913 Webster ]

n. One who, or that which, underprops or supports. [ 1913 Webster ]