Exodus 15:23

And when they came to Marah, they could not drink the water there because it was bitter. (That is why it was named Marah.)

Note Marah means bitter.

BSB · Berean Standard Bible
And when they came to Marah, they could not drink of the waters of Marah, for they were bitter: therefore the name of it was called Marah.

Note Marah: that is Bitterness

KJV · King James Version
When they came to Marah, they couldn’t drink from the waters of Marah, for they were bitter. Therefore its name was called Marah.

Note Marah means bitter.

WEB · World English Bible
And when they came to Marah, they could not drink of the waters of Marah, for they were bitter: therefore the name of it was called Marah.
ASV · American Standard Version

Related passages

From the Treasury of Scripture Knowledge, grouped by the word they explain.

Marah
Numbers 33:8; Ruth 1:20