The mysterious painting, she said, "is the most frustrating aspect."

Matrix work, for a man, has its frustrating aspects.

That was one of the most frustrating aspects of her gift.

Perhaps the most frustrating aspect of England's play has been the lack of line breaks.

For Riker, the most frustrating aspect of captivity came when you tried to talk, and nobody heard.

The most frustrating aspect of this was Tim's lack of desire to live.

There are many parenting tricks to help you deal with the tantrums and other frustrating aspects of raising a 2- to 5-year-old.

"This is the most frustrating aspect of this business," he said.

The most frustrating aspect is the lack of authority and the responsibility.

Nor do I, and that's the most frustrating aspect.