What is a…
Hebrew: ע —transliterations: en, ain or ayin —meaning: the bright open source, the eye of the landscape
A spring the point where underground water (an aquifer) flows to the surface. A spring is different than a well, which must be dug to reach the underground water.
Many natural springs are mentioned in the Bible.
“Springs” mentioned in the King James Version of Joshua 10:40 (Hebrew: 'ashdoth) should rather be “slopes,” as it is translated in the Revised King James Version, NKJV, NASB, ESV, etc.
It refers to the “undulating ground lying between the lowlands (the shephelah) and the central range of hills.” (Matthew G. Easton)