イーストいーすとCommon wordFreq.FrequencyTop 20,000Meanings1nounyeastCommon loanword for yeast, used in baking and brewing contexts. Synonymous with 酵母 (こうぼ), but イースト is more common in everyday cooking.See also: 酵母パンを作つくるにはイーストが必ひつ要ようです。You need yeast to make bread.このレシピではドライイーストを使つか