元気(げんき)いっぱい

A set phrase combining 元気(げんき) ('energy, health, vigor') with いっぱい ('full of'). It has a warm, positive tone and is especially common when talking about children, pets, or cheerful atmospheres. Can be used as a predicate (元気(げんき)いっぱいだ) or as an adverb (元気(げんき)いっぱいに).

Usage

As a predicate: 子(こ)どもたちは元気(げんき)いっぱいだ (the children are full of energy).
As an adverbial modifier: 元気(げんき)いっぱいに走(はし)り回(まわ)る (to run around full of energy).

Similar words

• 元気(げんき)はつらつ: brimming with energy — slightly more formal, often used in advertising
• 生(い)き生(い)きしている: lively, vibrant — describes liveliness in a broader sense
• ピンピンしている: hale and hearty — emphasizes physical health, especially of elderly people