fortune
The root of unfortunate would be fortune. un is the prefix and ate is the suffix.
"Un" is not a root word by itself. It is often used as a prefix in English to form negative words or opposite meanings, such as "unhappy" or "unfortunate."
The word "exhibit" has the same Latin root as the word "exhibitum," which means "display" or "show."
The word "cleaned" has the same root word as "unclean." Both words share the root word "clean."
The word "related" shares the same root as "interrelated."
Unfortunate
Παιδεία (transliterated paedeia, pronounced ped-ee-ah) It is the root for words as paedagogics, paedagogy etc. Since education is about children, it shares the same root with the word child. That is the reason why "paed-" is found both in words like paedagogics and in words such as "paedophile" (lover of children). An unfortunate connection in my opinion.
Fauna is the root word after the Roman Goddess by the same name.
terrible
Amplify, ample, and amplification all have the same root word as amplitude, which is "ample".
Three words that have the same root word as "trough" are "troughed," "troughs," and "troughing."
homo = same zygon = ox yoke