The phrase "a severely negative" is correct and usable in written English.
It can be used to describe something that has a strong adverse effect or connotation.
Example: "The report highlighted a severely negative impact on the environment due to the industrial activities."
Alternatives: "a highly detrimental" or "a profoundly adverse".
The Panic of 1893 had a severely negative effect on the Hoosier economy when many factories closed and several railroads declared bankruptcy.
Because of the delays, analysts said many investors were bracing themselves for a severely negative earnings restatement.
Bernanke has consistently warned that failure to raise the US borrowing limit would have a severely negative impact on the country's still-fragile economic recovery.
This chapter provides people's perceptions of risks posed by hazardous waste and describes the possibility of a severely negative or catastrophic outcome.
The commercial casts Mitt Romney's business background in a severely negative light, but it's not a typical slash-and-burn attack ad.
More research and science is bringing forth compelling evidence that proves punishment can have a severely negative impact on our children's emotional health.
Moreover, we find that the A66W mutation has a unique, severely negative impact on development, which may be explained by enhancement of tubulation and vesiculation induced by this mutation in vitro [8].
The National Association of Realtors has lobbied Congress and federal agencies to thwart adoption of any form of mandatory labeling of existing houses, arguing that an abrupt move to adopt such a system could have severely negative effects.
The National Assn. of Realtors has lobbied Congress and federal agencies to thwart adoption of any form of mandatory labeling of existing houses, arguing that an abrupt move to adopt such a system could have severely negative effects.
Such an attitude could often be found among moderate Catholics, men of letters, jurists, writers and even theologians and was not in conflict with Bodin's severely negative assessment — on a purely political level — of the Huguenots as a result of their raising arms against their sovereign.
It was largely drowned out in the news cycle, but the National Labor Relations Board just made a big move that could bring severely negative outcomes for workers all over the country.
