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| a chattering or flighty, light-headed person. |
| a fool or simpleton; ninny. |
| stumbling block | |
| —n | |
| any impediment or obstacle | |
stumbling block
A hindrance or obstacle, as in His lack of a degree is a real stumbling block to his advancement. This term originally meant "a tree stump over which one trips." Its figurative use dates from the early 1500s.