the word 'teepee' entered english in the 18th century from the dakota language, where "thípi" simply means "a dwelling" or "they dwell." it is a direct borrowing that describes the specific conical tent structure iconic to the plains indians. the english spelling was adapted to approximate the native pronunciation, resulting in the double 'e'. as a cultural loanword, its form and meaning were adopted whole into english to fill a lexical gap for an item foreign to european settlers, and it retains its specific reference to this indigenous structure.

this word is a loanword from a native american language (dakota "thípi," meaning "dwelling"). it is not segmented into classical morphemes of latin or greek origin within english.