Cough \Cough\ (k?f), v. i. [imp. & p. p. Coughed (k?ft); p. pr. & vb. n. Coughing.]

[Cf. D. kuchen, MHG. k?chen to breathe, G. keuchen to pant, and E. chincough, the first part of which is prob. akin to cough; cf. also E. choke.]

To expel air, or obstructing or irritating matter, from the lungs or air passages, in a noisy and violent manner.

Source: Webster's Revised Unabridged Dictionary (1913)