The spelling of the word "Rearden" can be a bit tricky, as it can be pronounced in different ways depending on the regional dialect. However, in American English, the typical pronunciation is \ri:rdən\, with the stress on the first syllable. The "ea" is pronounced as a long "e" sound, while the "ard" is pronounced with a short "a" sound followed by a rolled "r". The final "en" is pronounced as a schwa sound. Overall, the IPA transcription for the word "Rearden" is /ri:rdən/.
The word "Rearden" does not have a widely known etymology as it seems to be a proper noun without a clear linguistic origin. However, it is worth mentioning that "Rearden" is famously associated with the character Hank Rearden in Ayn Rand's novel "Atlas Shrugged", published in 1957. As a proper name, it is likely that Rand created the name specifically for her character and its meaning or origin is not rooted in any specific historical or linguistic context.