Слово "effervescent". Англо-русский словарь Мюллера

But when the first moment passed and words came, it was all right, and their thoughts flowed together like two effervescent brooks and coursed gaily through the arroyo of the afternoon.

The weather was magnificent; we left town on the 9th of May, on St. Nicholas's day. I used to walk about in our garden, in the Neskutchny gardens, and beyond the town gates; I would take some book with me—Keidanov's Course, for instance—but I rarely looked into it, and more often than anything declaimed verses aloud; I knew a great deal of poetry by heart; my blood was in a ferment and my heart ached—so sweetly and absurdly; I was all hope and anticipation, was a little frightened of something, and full of wonder at everything, and was on the tiptoe of expectation; my imagination played continually, fluttering rapidly about the same fancies, like martins about a bell-tower at dawn; I dreamed, was sad, even wept; but through the tears and through the sadness, inspired by a musical verse, or the beauty of evening, shot up like grass in spring the delicious sense of youth and effervescent life.

With effervescent agility the chaplain ran through the whole gamut of orthodox immoralities, while Nately sat up in bed with flushed elation, astounded by the mad gang of companions of which he found himself the nucleus.