What is how to pronounce open?

The word open is pronounced as "OH-puhn". The first syllable, "OH", is pronounced with a long "o" sound, like in the word "so". The "p" is pronounced with an aspirated "p" sound, like in the word "pop". The second syllable, "puhn", is pronounced with a short "u" sound, like in the word "fun", followed by an "n" sound. The stress is on the first syllable, "OH".