monotonous /məˈnɒt(ə)nəs/ Learn to pronounce adjective adjective: monotonous lacking in variety and interest. Indra, son of the chief of the Northern Water tribe and younger brother of Yue. A boy at the age of 13, one of the best Waterbending masters out there. Suddenly on an adventure with the Avatar after promising his - now deceased (?) - sister to protect the foolish Southern Water Tribe boy she fell in love with. "...How annoying..." - Indra (Hindu) Indra - King of the Gods, God of weather, and bringer of rain, thunderstorms and clouds.