Yom
What was the Hebrew word used for “day” in Genesis Chapter 1?
There are twelve words in Hebrew that can mean “day,” but the word that was used when referring to the days in the Creation week was “yom.”
The Hebrew word for “day” used in Genesis Chapter 1 (Source: Answers in Genesis)
Ten of those twelve available words mean longer periods of time, but “yom,” when used in the context of Genesis, always means a literal 24-hour day. You can learn more about this word in the Strong’s Concordance (#3117). For more information, see the article “How long were the days in Genesis?”