"Impennates" is a word that refers to birds that cannot fly. The correct spelling of this peculiar term comes from the combination of Latin roots "in-" and "penna," meaning "not" and "feather" respectively. The IPA phonetic transcription of this word is /ɪmˈpɛnɪts/, indicating the stress on the second syllable and the correct pronunciation of each letter in the word. Even though it is not a commonly used word, knowing its correct spelling and pronunciation can improve one's vocabulary and linguistic skills.
Swimming birds having short wings covered with feathers resembling scales.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.