the GNU version of the Collaborative International Dictionary of English
ad. In an insufficient manner or degree; unadequately.
The Century Dictionary and Cyclopedia
In an insufficient manner; inadequately; with lack of ability, skill, or fitness.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
ad. to an insufficient degree
Word Usage
"In an appearance in Rock Hill, S.C., Mr. Gingrich said Republicans can't defeat President Barack Obama with a candidate like Mr. Romney, whom he called insufficiently conservative."