'手机' (shǒu jī) literally means 'hand machine' — '手' (shǒu) means 'hand', and '机' (jī) means 'machine' or 'device'. Together, they refer to the portable communication device we carry in our hands: the mobile phone. It is the standard, neutral term used across mainland China, Taiwan, and other Mandarin-speaking regions, replacing older terms like '大哥大' (dà gē dà) in everyday speech.

This word is essential for daily life — used when talking about making calls, sending messages, using apps, or even losing or charging your device. Unlike English, Chinese doesn’t distinguish formally between 'mobile phone' and 'cell phone'; '手机' covers all modern handheld phones, whether smartphones or basic models. It’s commonly modified by measure words like '一部' (yí bù) — e.g., '一部手机' — and frequently appears in phrases like '玩手机' (wán shǒu jī, 'to play on one’s phone') or '关机' (guān jī, 'to power off').