A verb for “conceal” in The Etymologies of the 1930s under the root ᴹ√DUL “hide, conceal” (Ety/DUL).
Noldorin
delia-
verb. to conceal
delia-
verb. to conceal
telia-
verb. to play
teilia-
verb. to play
doltha-
verb. to conceal
doltha-
verb. to conceal
ganna-
verb. to play a harp
gannada-
verb. to play a harp
A verb appearing as dœlio > delio “conceal” in The Etymologies of the 1930s under the root ᴹ√DUL “hide, conceal” (Ety/DUL; EtyAC/DUL). Its modern form indicates that first short u > o, and then this o underwent i-affection > œ > e.
Neo-Sindarin: These phonological developments may present some problems with Tolkien’s later ideas of how u > o in Sindarin. To avoid those complications, I recommend using N. doltha- “conceal” instead.