Wiktionary
prohibitively
adv. 1 In a prohibitive manner. 2 To a prohibitive extent.
WordNet
prohibitively
adv. to a prohibitive degree; "it is prohibitively expensive"
Usage examples of "prohibitively".
On the other hand, the cost of accessing the net is still prohibitively high.
The car was a stale Chrysler four-door on permanent loan from his father, its numerous arthritic complaints prohibitively expensive to treat, the missing passenger window a flapping sheet of taped plastic, the interior having been broken into five, six, seven times, routine in a neighborhood neither parent, to his indifference, would ever consent to visit.
Though he owned and managed a merchant fleet of more than a hundred space-folding cargo vessels, the technology was still prohibitively risky.