Meanings of youthful vivacity in English

Knowing his eminence, I was quite surprised by his youthful vivacity.

This youthful vivacity did not desert him in later years.

On seeing now that the thirty minutes had elapsed, Thugut rose with youthful vivacity, and laid his pipe aside.

Then, with youthful vivacity, he expressed his pleasure in seeing him again, and, without permitting Wolf to speak, he repeatedly exclaimed:

Still, there was a lurking uneasiness and anxiety, born of the inexorable facts, which favorable circumstances and youthful vivacity could not wholly overcome.

Fanny had watched eyes, much brighter than Sidwell's; her youthful vivacity blended with an odd little fashion of schoolgirl pedantry in a very piquant way.

But while the youth was embracing his great-grandfather, who hugged and caressed him, Nun, with youthful vivacity, was issuing orders to the shepherds and servants:

"But I am tired," cried Plutarch, with quite youthful vivacity, "I am quite tired of keeping the ornaments for you.

"Yes, yes, you love me," cried Henry, to whom this strange and joyous surprise had imparted youthful vivacity and warmth.