Part of speech: Verb
treat cruelly
Example: The children tormented the stuttering teacher
Part of speech: Verb
hinder or prevent (the efforts, plans, or desires) of
Example: What ultimately frustrated every challenger was Ruth's amazing September surge; foil your opponent
Rag, Bedevil, Cross, Crucify, Dun
The word "frustrate" comes from Latin frūstrātus, which comes from Middle English frustraten.
Legal and medical professions still use Latin phrases because of its precision and historical authority.