A cough; the sound or action of forcefully expelling air from the throat or airways, often caused by a cold or allergy.
風邪をひいてから咳がひどくなった。
My cough got worse after I caught a cold.
会議中に咳が出てしまい、申し訳なかった。
I started coughing during the meeting and felt sorry about it.
赤ちゃんが夜中に咳をしていると心配になる。
It's worrying when a baby coughs at night.