To ‘prevent’ oneself from coughing is very difficult, since it is an involuntary reaction to something irritating the throat. ‘Prevention’ means doing something in advance of the cough (such as taking medication). To ‘restrain’ oneself from coughing suggests that the cough is just a tickle that can be suppressed voluntarily.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.