PARTNER n.
A framework of heavy timber surrounding an opening in a deck, to strengthen it for the support of a mast, pump, capstan, or the like. Dormant, or Silent, partner. See under Dormant, a.
REENFORCE v. 2 definitions
To strengthen with new force, assistance, material, or support; as, to reënforce an argument; to reënforce a garment; especially, to strengthen with additional troops, as an army or a fort, or with additional ships, as a fleet. [Written also reinforce.]