словарь английский - английский
- to stop something from happening or someone from doing something на английском языке:
1. 
thwart
Our holiday plans were thwarted by the airline pilots' strike
Fierce opposition thwarted the government's plans.
the plan is thwarted
I wanted to spend a week in New York this autumn, but the high costs of travel and lodging thwarted my plans.
I can remember the tail slapping and banging and the thwart breaking.
thwarting the Formulation of a child will make a mark on him or her for life
he never did anything to thwart his father
2. 
to prevent
That will help to prevent the situation worsening
Several studies show that drinking coffee helps to prevent some illnesses.
to prevent accidents/crime
You should make sure the leg is supported to prevent unnecessary movement.
They couldn't do anything to prevent the problem.
It's better to prevent than to cure.
