‘按键’ literally means ‘press key’ — combining 按 (to press, to depress) and 键 (key, as in a keyboard or keypad). It refers specifically to any physical or on-screen button that users press to input commands or data, especially on devices like computers, phones, remote controls, or ATMs. Unlike the broader term ‘按钮’ (button), which can refer to any interactive control (including graphical UI elements), ‘按键’ emphasizes the action of pressing and is most commonly used for keys with tactile feedback or functional input roles.

This word appears frequently in technical instructions, user manuals, and everyday tech-related conversation. It’s neutral in register and appropriate in both spoken and written Chinese. While it’s rarely used metaphorically, learners should note that ‘按键’ is countable and usually appears with measure words like ‘个’ (e.g., 一个按键) or ‘些’ when plural. It’s also common in compound terms like ‘功能按键’ (function key) or ‘快捷按键’ (shortcut key).