'Gōng fu' literally combines 'gōng' (effort, achievement) and 'fū' (a grammatical particle often used in compound nouns). Together, it refers to the time, energy, and persistent practice required to develop a skill—whether martial arts, calligraphy, cooking, or language learning. It emphasizes process over innate talent and implies deep dedication.

The term is widely used in both concrete and abstract contexts: you might say someone has 'good gōng fu' in playing the guqin, or that solving a complex math problem took 'a lot of gōng fu'. Unlike 'jì qiǎo' (trick/technique), 'gōng fu' always carries the connotation of accumulated effort and refinement over time. It’s also commonly borrowed into English as 'kung fu', though in Chinese it applies far beyond martial arts.