This is the 11267th most frequent Catalan word.
tossir
To cough.
Here, 'tossir' is used in its general, literal sense referring to the physical act of coughing.
Quan estàs refredat, sovint pots tossir molt.
When you have a cold, you may often cough a lot.
In this case, 'tossir' is applied to indicate an instantaneous reaction to a feeling of blockage in the throat.
El nen va tossir perquè tenia alguna cosa travessada a la gola.
The child coughed because there was something stuck in his throat.
Here, 'tossir' is contextualized within an inquiry about behavior, illustrating its use in discussing frequency or appropriateness.