Pronunciation: [ʌnhˈe͡ɪstɪəst] (IPA) 
The word "unhastiest" is spelled with the prefix "un-" meaning "not" and the root word "hastiest." The IPA phonetic transcription of "unhastiest" is /ʌnˈheɪstɪəst/. The first syllable "un-" is pronounced as "ʌn" and the second syllable "hast" is pronounced as "heɪst." The suffix "-iest" is pronounced as "ɪəst" and means "most" or "superlative." Therefore, "unhastiest" means "not the most hasty" or "least hasty."
"Unhastiest" is derived from the combination of two elements: "un-" and "hasty".
- "Un-" is a prefix of English language origin, derived from Old English "un-" or "on-" which indicates a negation or reversal of the root word's meaning. In this case, it negates the word "hasty", indicating the absence or opposite of hastiness or hurriedness.
- "Hasty" comes from Middle English "hasti", which originated from Old French "hastif". It ultimately traces back to Latin "hastus", meaning "quick" or "eager".
Therefore, when the prefix "un-" is added to "hasty", it creates "unhastiest", meaning the opposite or absence of being quick or eager.
