积极 (jī jí) is an adjective meaning 'active,' 'positive,' or 'proactive.' Literally, 积 means 'to accumulate' or 'to build up,' and 极 means 'extreme' or 'utmost' — together they suggest a state of energetic, purposeful engagement, as if one has built up momentum toward an extreme degree of involvement. It describes a mindset or behavior characterized by enthusiasm, initiative, and constructive effort rather than passivity or resistance.

This word is commonly used to describe people’s attitudes in work, study, or social situations — for example, a student who volunteers for tasks, asks questions, and studies independently is 积极. It also appears in formal contexts like policy documents or performance reviews, where it conveys commendable, forward-looking conduct. While often positive, 积极 can occasionally carry subtle pressure in group settings, implying that passivity may be viewed unfavorably.