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prevent (someone or something) from (doing something)

To stop a person or thing from being able to do something. Something is preventing the machine from turning off, so the motor is getting overheated. The government is trying to prevent us from exercising our right to free speech.
See also: prevent

prevent someone from doing something

to keep someone from doing something. You can't prevent me from doing it! We must try to prevent her from going back there.
See also: prevent
References in periodicals archive ?
With last year's nation-wide expansion of the service area, additional changes in staff were made to continue the same great service PREVENT customers have come to expect.
True or False: A player's helmet and pads will prevent catastrophic neck injury?
The number of index cases needed to be detected to prevent 1 death (assuming 6%-10% case-fatality ratio) would have been 150-180 with attack rates of 5% and 50-83 with attack rates of 30%.
The steps range from empowering floor nurses to deploy rapid response teams to prevent patients from going code blue--the step King believes would have saved Josie--to standardizing hygiene to prevent infections.
To prevent iatrogenic damage, the clinician can place a small, almost matrix-like band called the InterGuard (Photo 5) in the interproximal area before prepping the contact area.
Because dry solids in bags or in a bulk tank can get dirty, mills must prevent contamination.
The danger now is that misleading nevirapine stories published around the world will cause patients, doctors, or even governments to reject single-dose nevirapine to prevent mother-to-child HIV transmission, in cases when no other treatment is possible.
This type of support was capable of holding an axial force, a transverse force (shear force) and a couple (bending moment) to prevent rotation.
Over the past 20 years sports scientists have conducted research to see if regular stretching really does prevent injury.
Keeping those systems functioning will also help maintain communications with residents and prevent break-ins and other criminal acts from occurring.
Without question, latex male condoms are the best method available to prevent the transmission of STDs.
It doesn't mention that vitamin E has tailed to prevent heart disease in several major trials.
Several measures can be taken to prevent the occurrence of miliaria in people residing in nursing homes.
The problem can be even worse if the black hole list operator perceives that you are somehow truly at fault for the spam--either because he or she feels you did not take enough steps to prevent the misuse of your email system, or because you were, in fact, the source of the spam.