When combined, 打火机 (dǎhuǒjī) literally translates to a “strike-fire-machine,” a perfectly logical description of what a lighter does.
While a lighter is a simple utilitarian object, its use is tied to social interactions, particularly within China's widespread smoking culture. Offering someone a light with your 打火机 is a common and simple gesture of goodwill and politeness, similar to holding a door open for someone in the West. It's a small act that can break the ice between strangers or reinforce a connection between friends or colleagues. If you smoke, knowing how to ask to borrow a lighter or offer a light is a basic but important social skill. In a business context, a senior person or client might be offered a cigarette, and the junior person is often expected to be quick to provide a light with their 打-火机. This demonstrates attentiveness and respect. While smoking rates are declining globally, this social ritual remains common in many parts of China, making the 打火机 a small but significant tool in daily social currency.
The term 打火机 is used in all contexts, from formal to highly informal. It's a neutral, everyday noun.
The word itself doesn't carry any strong positive or negative connotations; it is purely descriptive.