v. To achieve less than expected; to fail to fulfil one's potential.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
v. perform less well or with less success than expected
Word Usage
""Most of us still have the capacity to take additional actions that would improve both short-run and long-run growth prospects," and the biggest risk to the global recovery is that advanced nations underachieve on growth, Mr. Geithner said."