The spelling of the word "Ehrhart" can be phonetically transcribed as /ˈɛr.hɑrt/. The first syllable is pronounced as "er" as in "her" or "fern." The second syllable is pronounced as "hart" as in "heart" or "part." The letter "h" in both syllables is pronounced, and the stress is on the first syllable. "Ehrhart" is a German surname that originated from the Old High German words "erchan" (meaning precious) and "harti" (meaning strong or hard).