Vocabulary mind boggling 驚(おどろ)くべき Samraworld Dictionary (1) Adjective astounding, hard to fathom. 驚くべき、理解しがたい。 Examples The complexity of the application was mind boggling. アプリケーションの複雑さは驚くほどでした。 Related Lessons Europe is Wonderful After All These Years The Stylish Heart of Austria, Vienna Supplemental Information External dictionary