The correct spelling of the word "centar" should actually be "center". The phonetic transcription of "center" is /ˈsɛn.tər/. The "c" at the beginning of the word is pronounced as an "s" sound, and the "a" in the second syllable is pronounced as a schwa sound (ə). It's important to use correct spelling and pronunciation in order to effectively communicate with others. So, next time you see someone spelling "centar", correct them and let them know it should be "center".