This is the 14152nd most frequent Spanish word.
toser
To cough.
Here, 'toser' is used in its literal sense to describe the act of coughing as a reflex or reaction.
Él comenzó a toser debido al polvo en la habitación.
He started coughing due to the dust in the room.
In this case, 'toser' implies an intentional act often used to manage a situation or buy time.
Cuando me sentí nervioso durante la presentación, tuve que toser para ganar tiempo.
When I felt nervous during the presentation, I had to cough to buy some time.
Here, 'toser' is used descriptively to indicate the occurrence of coughing without additional implications.