Here's a breakdown:
* "Ho": This word was used as a general greeting, similar to "hello" today. It was a casual and informal way to acknowledge someone.
* "Hi": In the late 19th century, "ho" started being shortened to "hi" in American English. This shortening likely happened due to the informal nature of the word and the desire for a quicker, more casual greeting.
So, "hi" is essentially a condensed version of a once-common greeting! It's a testament to how language evolves and adapts over time.