Usage Note
Toser is a regular -er verb. The derived noun is tos (cough, feminine), and a persistent cough is tos crónica. The expression no hay quien le tosa (there is no one who dares to cough at him) means no one can rival or challenge someone — a vivid colloquial idiom.
Examples
"Empezó a toser durante la reunión."
Natural Translation
He started coughing during the meeting.

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