The word "Janiusz" is pronounced ˈjaniuʃ. The first letter "J" is pronounced as the English "y" sound, followed by "a" pronounced as in "cat". The combination "ni" is pronounced as "nyee". The letter "u" is pronounced like the English "oo", followed by "sz" which sounds like "sh". Finally, the word ends with the letter "u" again, pronounced like the English "oo". This phonetic transcription helps to explain the spelling of the word "Janiusz".