Isaiah 1:30

Strongs #424/423/422/421 We know el אל means “god/mighty one/lofty one” and is a masculine noun. The feminine noun eloah/elah אלה however has been translated as the “terebinth tree” or “oak tree”. Elon אלון is also the same noun for the tree but with the paragogic nun suffix which is generally used as a diminutive suffix for something that is a mini or small version of the thing, much like -let or -y in English. Elon has been called a “variation” of elah. The root is known to be the same: to be strong, lofty. Hence the oak tree is often used because it is strong and lofty. Essentially it means "god tree" or "tree of god". Strong, lofty, mighty, his leaf "ascends" and does not fade, etc. See Strongs #424 and #437.