boundless / limitless / unflagging energy - неограниченная энергия
boundless / great / unbounded / unbridled / wild enthusiasm - безграничный энтузиазм
boundless / great / unbounded joy - безграничная, большая радость
boundless / unbridled / overweening ambition - чрезмерное тщеславие
the immense and boundless universe - бескрайняя и бесконечная Вселенная
boundless energy - безграничная энергия
boundless opportunities - безграничные возможности
knowledge is boundless-human capacity is limited - знание-безгранично, человеческие возможности имеют предел
We were filled with boundless joy. - Нас наполняла безграничная радость.
I went on deck and overlooked the boundless waters. - Я вышел на палубу и стал смотреть на бескрайние водные просторы.
Her love for her family was boundless. - Её любовь к семье была безграничной.
the modern world with its quick material successes and insolent belief in the boundless possibilities of progress - современный мир, с его быстрым материальным успехом и дерзкой верой в безграничные возможности прогресса
boundless energy: If you describe something as boundless, you mean that there seems to be no end or limit to it. [...]
boundless optimism: If you describe something as boundless, you mean that there seems to be no end or limit to it. [...]
boundless enthusiasm: Enthusiasm is great eagerness to be involved in a particular activity which you like and enjoy or which you think is important.