[uhn-der-in-shoo r, -shur]
verb (used with object), un·der·in·sured, un·der·in·sur·ing.
to insure for an amount less than the true or replacement value: It's risky to underinsure your home.
Origin of underinsure
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
not having enough insurance to cover the cost of a loss
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012