This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

v. Third-person singular simple present indicative form of frustrate.

"An accurate, and descriptive directory name frustrates less, than one called “temp†or “001†which can clash with similar named directories on client computers."

frustrated    frustrates    frustrating   

vain    ineffectual    useless    unprofitable    null    voil    nugatory    defeat    balk    foil   

confuse    Embarrass    disappoint    annoy    frighten    disturb    tedious    bore    excite    pointless