According to WJ/366, the preposition "is normally o in all positions, though od appears occasionally before vowels, especially before o-". With a suffixed article, see also uin
Noldorin
-or
suffix. agental suffix
naneth
noun. mother
o
preposition. from, of (preposition (as a proclitic) used in either direction, from or to the point of view of the speaker)
-on
suffix. masculine suffix
-we
suffix. masculine suffix
anna-
verb. to give
tonn
adjective. tall
-(r)on
suffix. agental suffix
ant
noun. gift
calen
adjective. green, (orig.) bright-coloured
emil
noun. mother
eria-
verb. to rise
gorf
noun. impetus, vigour
ant
noun. gift
emil
noun. mother
gorf
noun. impetus, vigour
tol-
verb. to come
toltha-
verb. to fetch, summon, make come
-on
suffix. agental suffix
nana
noun. mother, mummy
naneth
noun. mother
tindu
noun. dusk, twilight, early night (without Moon)
tindu
noun. starry twilight
tinnu
noun. dusk, twilight, early night (without Moon)
tinnu
noun. starry twilight
tond
adjective. tall
tonn
adjective. tall
A noun for “mother” in The Etymologies of the 1930s derived from the (Noldorin-only?) root ᴹ√NAN (Ety/NAN). It apparently replaced archaic/poetic N. †emil (Ety/AM¹; EtyAC/AM¹).
Conceptual Development: The Gnomish Lexicon had a similar set of words for “mother”: G. maba, mabir, baba, and mavwin from the early root ᴱ√maƀ “something nice” (GL/57). The last of these appeared as G. mavwen “ancestress” in the Gnomish Lexicon Slips modifying that document, with an archaic meaning of “mother” and variant forms mafwyn and mavuin (PE13/115). In these slips, it seems the normal “mother” word was G. nân (originally glossed “father”) with variant nanwin (PE13/115). This last word is likely the direct precursor of N. naneth.
Neo-Sindarin: I would use S. emel from the late 1960s as the normal word for “mother” in Neo-Sindarin, but would retain N. naneth as a dialectical or more formal variant.