To say you will harm or hurt someone, or when something seems likely to cause danger or harm.
From Old English 'threotan' meaning 'to push or press.' It evolved through Middle English to mean 'to menace' or 'express intent to harm' by the 1300s.
Animals rarely actually threaten—instead, they use genuine warning signals like hissing or growling that mean serious business, while humans often bluff with threats they don't intend to carry out.
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