To (cause to) unravel; used particularly for the edge of something made of cloth, or the end of a rope. Example: The ribbon frayed at the cut end.
To cause exhaustion, wear out (a person's mental strength). Example: The hectic day ended in frayed nerves. (Metaphorical use; nerves are visualised as strings)
Frighten; alarm
To bear the expense of; to defray.
To rub.
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