🔼The name Adummim in the Bible
Since in the time of Jerome (who wrote the Vulgate) this place was known as the "red" or "blood way" and was a known hotspot for robbers and cut throats, tradition has it that this was the ascent between Jerusalem and Jericho where Jesus' fictional story of the good Samaritan played (Luke 10:30).
🔼Etymology of the name Adummim
The name Adummim could be the plural of the word אדם ('adam), meaning man(kind), as in the name Adam. But that noun never occurs in plural, simply because there's only one man(kind). But our word is also the plural of a noun derived from the verb or adjective אדם (adom, meaning red or be red. In fact, besides as our name Adummim, the word אדמים occurs only three times in the Bible. In 2 Kings 3:22 the Moabites see the waters red (אדמים) as blood (דם). In Zechariah 1:8, the prophet sees the red (אדם) rider with red (אדמים) horses behind him, and in Zechariah 6:2 he sees a chariot pulled by red (אדמים) horses.
The form אדם ('dm) is part of a substantial cluster of roots that tend to have to do with either production or stillness:
For a meaning of the name Adummim, NOBSE Study Bible Name List reads Red Spots and Jones' Dictionary of Old Testament Proper Names (who treats the whole term מעלה אדמים) proposes The Going Up Of The Red Earths. BDB Theological Dictionary does not translate this name.
The form אדמים occurs in the narrative with the meaning of Red Ones in 2 Kings 3:22, Zechariah 1:8 and 6:2.
Note the world play of the Chronicler when he alters Samuel's תורת האדם, the laws of man, to האדם המעלה, the ascent of man (1 Chronicles 17:17, 2 Samuel 7:19).