Lethargic

Antonyms of LETHARGIC

vivacious, assiduous, strenuous, high-energy, occupied, snappy, bouncing, physical, active, energetic, rattling, driving, dynamic, kinetic, caring, tireless, hardworking, indefatigable, springy, alert, diligent, peppy, canty, lively, merry, busy, sprightly, spanking, engaged, industrious, zippy, animated, unwearying, perky, sedulous, working, vital, brisk, unflagging.