full of energy; extremely healthy; in high spirits
Expresses a state of being very energetic, lively, or in excellent spirits. Often used as an exclamation or in set phrases like 元気百倍で頑張る.
I'm full of energy since this morning.
Let's do our best today with high spirits!
元気 is the general word for 'healthy, energetic, fine'. 元気百倍 is a stronger, more emphatic expression meaning 'extremely energetic'.
元気一杯 also means 'full of energy', but 元気百倍 carries a nuance of being multiplied a hundredfold, suggesting even greater vigor.
Compound of 元気 (genki, 'energy, health') and 百倍 (hyakubai, 'hundredfold'). The expression literally means 'energy multiplied by a hundred', emphasizing extreme vitality.