It is difficult to know which word and which language you mean - there is an Ojibwe word niijii meaning a male friend, as in the common expression boozhoo niijii (hello my fried). This can sound something like your neechie, but the middle consonant is definitely j.
there is no such word in the native American vocabulary.
Nothing, since it is not a word in any native American language.
white
Yanala is not a native American word - it appears to be a name in one of the languages of India.
River of death
Heiwa (平和) is the Japanese word for peace and has nothing to do with any native American language.
Hurricane comes from the Taino language word for wind.
Wagosh is the Algonquin (Native American) word/name for "Fox"
It means "children of the sun" in Salish.
How do you pronounce the Native American word techihhlia?
Nothing, since it is not a word in any native American language.Shylah seems to be a name in one of the languages of India, perhaps meaning "daughter of the mountain".