The act of warning someone; giving advice to be careful or take precautions against danger.
From caution (verb) + -ing present participle suffix. Caution comes from Latin cautio (care, security) via Old French.
The verb 'cautioning' shows up constantly in old literature—characters 'cautioning' each other about dangers. It's one of the oldest senses of the word, from when 'caution' meant actively giving careful advice.
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