Shirabe
一気 に

一気いっき

Common Noun
English jmdict
1
noun (common) (futsuumeishi) one breath
2
interjection (kandoushi) chug!;drink!
chanted repeatedly as a party cheer

一気にいっきに

Common Adverb
English jmdict
1
adverb (fukushi) in one go;in one gulp;in one breath;without stopping;without pausing;without a rest;in one sitting;at a stretch
彼は一気に１０時間働いた。
He worked ten hours at a stretch.
2
adverb (fukushi) suddenly;all of a sudden;all at once