kohng-woahn ---- 공원
depending on whatever a person's original language is, and my own choice of "romanization", this is my interpretation of the sounds:
ㄱ ㅗㅇ = kong or kohng, like in King Kong.
우 ㅓ = ū aw or oo aw
워 = wūaw
원 = wūawn or woo-awn or woo-ahn