How to Say "thwarting" in Spanish
The Spanish word for “thwarting” is “frustración” — B2 level.
English → SpanishB2
nounB2formal
the act of preventing a plan from succeeding

Examples
La frustración del plan fue culpa de la lluvia.
The thwarting of the plan was the rain's fault.
Hubo una frustración de sus esperanzas políticas.
There was a failure of his political hopes.
Noun for actions
In this sense, 'frustración' acts as the result of a plan being 'frustrado' (stopped/broken). It describes the event rather than a person's mood.
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