Nahd-jee-mahd-yar
Here's a breakdown:
* Nahd: The "gy" sound is similar to the "j" in "gem" or "gentle."
* jee: The "y" is pronounced like the "ee" in "see."
* mahd: The "y" is pronounced like the "i" in "machine."
* yar: Similar to the "yar" in "yard."
It's important to remember that Hungarian pronunciation can be tricky for English speakers. The emphasis is generally on the first syllable.