be inadequate

See: lack
References in classic literature ?
The only answer that can be given is, that as all these exterior provisions are found to be inadequate, the defect must be supplied, by so contriving the interior structure of the government as that its several constituent parts may, by their mutual relations, be the means of keeping each other in their proper places.
Bishop Robert Duncan of Pittsburgh, leader of a network of dissenting dioceses, said the proposal appears to be inadequate. "We are heartened that the national leadership of the Episcopal Church has realized the time has come for structural change.
Although most studies attempt to adjust for some of these confounding factors, the adjustments are likely to be inadequate due to measurement errors.
Furthermore, traditional hazardous materials and emergency medical procedures may be inadequate to respond to a WMD event (3-5).