ᴹ√ANGWA root. “snake”
The root √ANGWA “snake” with variant √ANGU appeared in The Etymologies of the 1930s as the basis for the words ᴹQ. ango “snake” (Ety/ANGWA) and angulóke “dragon” (Ety/LOK). The Noldorin equivalent am- seems to have survived only as a prefix (Ety/ANGWA), and is a good example of how [ŋgw] > [mb] in that language. There are a variety of other words for “snake” in Tolkien’s later writings, so whether this root remained valid is unclear.
References ✧ Ety/ANGWA, LOK