The word "unremorseful" is spelled with the prefix "un-" meaning "not", followed by the word "remorseful" meaning "feeling no regret or guilt". The phonetic transcription of this word in the International Phonetic Alphabet (IPA) is /ˌʌn.rɪˈmɔrs.fəl/. The "un-" prefix is pronounced as /ʌn/, with a short "u" sound. The stress falls on the second syllable, and the ending "-ful" is pronounced as /fəl/. Overall, the correct spelling and pronunciation of this word convey a sense of someone who lacks regret or remorse.
The word "unremorseful" is derived from the combination of the prefix "un-", which denotes negation or lack of, and the word "remorseful". The word "remorseful" comes from the noun "remorse", which dates back to the late 14th century. "Remorse" itself was borrowed from Old French "remors", which was derived from Latin "remorsus", a past participle of "remordere" meaning "to vex, disturb, or bite back". The Latin term is a combination of the prefix "re-", meaning "back", and "mordere", meaning "to bite". Hence, "unremorseful" is formed by prefixing "un-" to "remorseful" to indicate the absence or lack of remorse.