nicotine
The addictive alkaloid found in tobacco. Used in medical, chemical, and everyday contexts.
タバコにはニコチンが含まれている。
Cigarettes contain nicotine.
Nicotine addiction is hard to overcome.
Cigarettes contain nicotine.
He takes in nicotine every day through an e-cigarette.
A few hours after quitting smoking, he started feeling nicotine withdrawal.