"must forestall" is an acceptable phrase in written English and it can be used when one is looking to take action to anticipate or prevent something from happening.
For example, "We must forestall any potential problems before they arise."
We have enough expertise inside the country to move the [fusion] program forward … cooperation with other countries would accelerate the pace". During and after the current JCPOA, pursuit of this potentially far more destructive capability must be forestalled by the U.S. in the interest of regional and global stability.
In other words, the complainant must seek to forestall the demands of some general state policy, the validity of which he challenges.
But he asserts that as an advocate for consumers, his group must try to forestall the devastation that foreclosures wreak upon neighborhoods.
Yet the stakes could not be higher: some time before the end of the year, the Senate must vote to forestall a frightening mix of tax increases and spending cuts which has already been enacted and seems certain to plunge America back into recession unless it is rescinded.
We therefore conclude that prevention of filicide cannot remain the task of psychiatry alone, but health care and society at large must work to forestall the danger of filicide.
To prevent a steep recession becoming a depression, governments must step in to forestall financial collapse and counter the slump in private demand.
This is only a small step towards the 30% of the world's oceans that scientists say must be protected to forestall a collapse in fisheries.
However it occurs, Reich is adamant that a fundamental repositioning can and must occur — not to forestall some apocalyptic endgame but to prevent a slow fragmenting of the nation's social fabric.
But if researchers and institutional leaders want to support the most rigorous research, or even just forestall scandals, they must make this commitment.
