The word "mraz" is a Slavic surname that is pronounced as /mraʒ/. The IPA phonetic transcription tells us that the initial sound is a voiced bilabial nasal consonant (/m/), followed by an unvoiced postalveolar fricative consonant (/r/), and ending with an unvoiced postalveolar affricate consonant (/ʒ/). The spelling of the word "mraz" may seem unusual to English speakers, but it accurately reflects the sounds in the Slavic language. It is important to pay attention to the spelling and pronunciation of names in different languages and cultures to show respect and avoid misunderstandings.