In a neglectful manner; with neglect; with inattention; with carelessness or negligence.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
ad. in a neglectful manner
Word Usage
"Into the 1960 presidential election, Kissinger was among the adamant critics proclaiming that Eisenhower had neglectfully allowed a “missile gap” to develop with Moscow."