工具箱 (gōngjù xiāng) literally means 'tool box' — combining 工 (gōng, 'work' or 'craft'), 具 (jù, 'implement' or 'tool'), and 箱 (xiāng, 'box'). It refers to a container used to store and organize hand tools such as hammers, screwdrivers, wrenches, and pliers. While traditionally a physical metal or plastic box with compartments, the term is also used metaphorically in computing and education to describe a set of software functions or teaching resources designed for a specific purpose.

This word is commonly encountered in everyday life — in home repair, construction, DIY projects, and vocational training. It implies practicality, readiness, and systematic organization. Unlike generic terms like 箱子 (xiāngzi, 'box'), 工具箱 specifically signals functional utility and professional or hands-on context. It’s a compound noun with clear semantic transparency: each character contributes meaning, making it relatively easy to remember for learners.