“prevent”

To act in advance to obstruct or neutralize something before it can occur.

“She forestalled the argument by calmly laying all the evidence on the table before anyone could speak.”

Best for: Works well in formal writing, journalism, and strategic contexts.

To take action first in order to render another's action unnecessary or impossible.

“The governor preempted the protests by announcing the reforms himself at dawn.”

Best for: Strong in political, military, and competitive business contexts.

To oppose and defeat or frustrate a plan or attempt.

“Every scheme he devised was thwarted by the same relentless bureaucrat.”

Best for: Punchy and vivid; great for fiction, conflict-driven narratives, and opinion pieces.

To remove a difficulty or need before it can fully arise, making further action unnecessary.

“The new filtration system obviated the need for costly manual inspections altogether.”

Best for: Best in academic, technical, or legal writing for elegant precision.

To block or hinder progress so effectively that movement forward becomes impossible.

“The missing signature stymied the entire merger for three agonizing weeks.”

Best for: Informal but sharp; suits journalism, sports commentary, and casual storytelling.

To avert or ward off something harmful or undesirable, often used in archaic or dramatic registers.

“He raised his hands as if to forfend the very thought of such a reckless decision.”

Best for: Rare and archaic; ideal for historical fiction, poetic prose, or deliberate dramatic effect.