What is a synonym for the word thwart?

Here are some synonyms for "thwart," depending on the context:

General Synonyms:

* Prevent

* Hinder

* Obstruct

* Frustrate

* Block

* Check

* Defeat

* Counteract

* Undermine

* Foil

* Disrupt

More Specific Synonyms:

* Subvert (to undermine or overthrow)

* Sabotage (to deliberately damage or disrupt)

* Stymie (to prevent progress)

* Impede (to delay or hinder)

* Hamper (to hold back or restrict)

The best synonym will depend on the specific context and the nuance you want to convey.