Strong’s Greek
G5269 — hupozonnumi
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ὑποζώννυμι
hupozonnumi — pronounced hoop-od-zone'-noo-mee
from 5259 and 2224; to gird under, i.e. frap (a vessel with cables across the keel, sides and deck):--undergirt. see GREEK for 5259 see GREEK for 2224
1 occurrence in the KJV.
Acts 27:17
Which when they had taken up, they used helps, undergirding the ship; and, fearing lest they should fall into the quicksands, strake sail, and so were driven.