adjective · burning fiercely or brightly; blazing

炉里的火势炽盛，散发出阵阵热浪。

adjective · extremely strong or vigorous, as with emotions, desires, or energy

他心中求知的欲望日益炽盛。

adjective · flourishing, booming, or in a state of vigorous growth

大唐盛世，文化交流极其炽盛。