The use of impact as a verb meaning “to have an effect” often has a big impact on readers. Eighty-four percent of the Usage Panel disapproves of the construction to impact on, as in the phrase social pathologies, common to the inner city, that impact heavily on such a community. Ninety-five percent disapprove of the use of impact as a transitive verb in the sentence Companies have used disposable techniques that have a potential for impacting our health. It’s unclear why this usage provokes such a strong response, but it can’t be because of novelty. Impact has been used as a verb since 1601, and its figurative use dates from 1935, allowing people plenty of time to get accustomed to it. It may be that its frequent appearance in jargon-riddled remarks of politicians, military officials, and financial analysts has made people suspicious. Nevertheless, the use of impact as a verb has become so common in corporations and institutions that younger speakers have begun to regard it as standard. It seems likely, therefore, that the verb impact will eventually become as usual as the verb contact has become over the last 30 years.
