A noun in the Gnomish Lexicon of the 1910s glossed “a plain” (GL/23), probably derived from the root ᴱ√PALA “flatness” as suggested by Christopher Tolkien (LT1A/Palúrien; QL/071).
Gnomish
eng(a)
noun. plain, vale
engan
noun. spear
bladwen
noun. plain
A noun in the Gnomish Lexicon of the 1910s given as enga “plain, vale” (GL/32). It also appeared in the Name List to the Fall of Gondolin as eng “a plain or vale” (PE15/24). It was probably derived from the early root ᴱ√EŊE from Qenya Lexicon which had derivatives like ᴱQ. endl “plain, vale” (QL/36).