IPA incoming
/nɪmzɑɹ/ or /nɪmzɑr/
/n/ voiced alveolar nasal
/ɪ/ high front unrounded vowel
/m/ voiced bilabial nasal
/z/ voiced alveolar fricative
/ɑ/ low back unrounded vowel
/ɹ/ voiced alveolar retroflex liquid or /r/ voiced alveolar trill
or if you don't know any IPA
the n is pronounced as any n is in English
the i is pronounced as in fit, mitt, sit, it, etc.
the m is pronounced as any m is in English
the z is pronounced as in Zebra, the the first sound in xylophone
the a is pronounced as in far, car, lark, bark, etc.
the r is pronounced as any r is in English or as a trill if you want... no gargling of this r though (looking at you GERMAN and related r gargling languages... I kid of course... I think the voiced uvular fricative is AWESOME).