cast about
cast about also cast around {v.}, {literary}
1. To look everywhere; search.
The committee was casting about for an experienced teacher to take the retiring principal's place.
2. To search your mind; try to remember something; try to think of something.
The teacher cast about for an easy way to explain the lesson.
Jane cast around for a good subject for her report.
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Source: A Dictionary of American Idioms
