[cough] vb [ME, fr. (assumed) OE cohhian; akin to MHG kuchen to breathe heavily] vi (14c) 1: to expel air from the lungs suddenly with an explosive noise
2: to make a noise like that of coughing ~ vt: to expel by coughing--often used with up "~ up mucus"
[2]cough n (14c) 1: a condition marked by repeated or frequent coughing
2: an act or sound of coughing