활기차다 (hwalgichada) means “full of energy,” “lively,” or “active” A. It describes a state of enthusiasm or vibrancy, often used to describe people, places, or atmospheres.
For example, you might say:
그는 오늘 활기차다. (“He is full of energy today.”)
시장 분위기가 활기차다. (“The atmosphere of the market is lively.”)