The word "unimitated" is spelled with the prefix "un-" meaning "not", followed by the root word "imitated", which means "copied or mimicked". In phonetic transcription, "unimitated" is pronounced /ʌnˈɪmɪteɪtɪd/. The stress falls on the second syllable "mi", with the short "i" sound in both syllables. The word is used to describe something that has not been copied or replicated and is unique or original.
Not copied in form, &c.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.