This is the 6261st most frequent Turkish word.
öksürük
"Cough."
In this sentence, 'öksürük' is used as a noun meaning 'a cough' and signifies the physical symptom experienced.
Bugün çok şiddetli bir öksürük ile uyandım.
Today, I woke up with a severe cough.
Here, 'öksürük' as a noun is used possessively to describe someone's (father's) specific condition involving coughing.
Babamın öksürüğü giderek kötüleşiyor, doktora gitmeli.
My father's cough is worsening; he should see a doctor.
In this sentence, 'öksürük' is a noun referring to the general concept of coughing, linked to environmental factors.