A noun in The Etymologies of the 1930s glossed “parent” derived from the root ᴹ√ONO “beget” (Ety/ONO), where [[s|[nr] became [ðr]]]. It was originally based on primitive ᴹ✶onrō, but suffixal -ro did not survive in Noldorin/Sindarin, and was replaced by other agental suffixes like -ron.
Noldorin
odhril
noun. parent (f.)
odhril
noun. parent
odhron
noun. parent
odhron
noun. parent
A feminine variant of N. odhron “parent” from The Etymologies of the 1930s (Ety/ONO), using the feminine agental suffix -ril rather than -ron. See N. odhron for further discussion.