The word "Unthriftihead" is a curious combination of three different words - "unthrift", "i", and "head". According to the International Phonetic Alphabet (IPA), the pronunciation of this word is /ʌnˈθrɪftiˌhɛd/. The first two letters "un" denote the negative prefix meaning "not", followed by "thrift" meaning careful use of money, and finally "i" and "head" meaning "one who has a head" respectively. Thus, the term could be interpreted as someone who lacks the ability to manage finances responsibly.