an (1) _conj. and prep. _"for" (Nam, RGEO:66), an cé mo quernë… "for if one turned…" (VT49:8), also used adverbially in the formula an + a noun to express "one more" (of the thing concerned: an quetta "a word more", PE17:91). The an of the phrase es sorni heruion an! "the Eagles of the Lords are at hand" (SD:290) however seems to denote motion towards (the speaker): the Eagles are coming. Etym has an, ana "to, towards" (NĀ1). The phrase an i falmalī _(PE17:127) is not clearly translated but seems to be a paraphrase of the word falmalinnar "upon the foaming waves" (Nam)_, suggesting that an can be used as a paraphrase of the allative ending (and if falmalī is seen as a Book Quenya accusative form because of the long final vowel, this is evidence that an governs the accusative case). In the "Arctic" sentence, an is translated "until". Regarding an as used in Namárië, various sources indicate that it means an "moreover, further(more), to proceed" (VT49:18-19) or ("properly") "further, plus, in addition" (PE17:69, 90). According to one late source (ca. 1966 or later), an "is very frequently used after a full stop, when an account or description is confirmed after a pause. So in Galadriels Elvish lament […]: An sí Tintallë, etc. [= For now the Kindler, etc…] This is translated by me for, side an is (as here) often in fact used when the additional matter provides an explanation of or reason for what has already been said". Related is the use of an + noun to express "one more"; here an is presumably accented, something the word would not normally be when used as a conjunction or preposition.
Quenya
an i falmalī
*on the foaming waves
falma
(crested/foaming) wave
an
for
-li
the elves
-li partitive pl. ending (simply called a plural suffix in the Etymologies, stem LI). The ending is used to indicate a plural that is neither generic (e.g. Eldar "the Elves" as a race) nor definite (preceded by article); hence Eldali is used for "some Elves" (a particular group of Elves, when they are first mentioned in a narrative, VT49:8). Sometimes Tolkien also lets -li imply a great number; in PE17:129, the form falmalinnar from _Namárië _is broken down as falma-li-nnar "foam wave-many-towards-pl. ending", and falmali by itself Tolkien translated "many waves" (PE17:73). A distinct accusative in -lī seems to occur in the phrase an i falmalī (PE17:127, apparently meaning the same as i falmalinnar, but replacing the allative ending with a preposition). Genitive -lion in vanimálion, malinornélion (q.v. for reference), allative -linna and -linnar in falmalinnar, q.v. The endings for other cases are only known from the Plotz letter: possessive -líva, dative -lin, locative -lissë or -lissen, ablative -lillo or -lillon, instrumental -línen, "short locative" -lis. When the noun ends in a consonant, r and n is assimilated before l, e.g. Casalli as the partitive pl. of Casar "Dwarf" (WJ:402), or elelli as the partitive pl. of elen "star" (PE17:127). It is unclear whether the same happens in monosyllabic words, or whether a connecting vowel would be slipped in before -li (e.g. ?queneli or ?quelli as the partitive pl. of quén, quen- "person").
ten
for
ten (2) conj. "for", in Fíriel's Song; apparently replaced by an in LotR-style Quenya.
falma noun "(crested/foaming) wave" (PHAL/PHÁLAS), "a wave-crest, wave" (VT42:15), "foam wave" (PE17:127), "a breaker" (PE17:62), partitive pl. falmali "many waves" (PE17:73), allative falmalinnar "on the foaming waves" in Namárië(Nam, RGEO:67); the phrase an i falmalī _(PE17:74) seems to be a paraphrase of this with an independent preposition instead of the allative ending -nna (see an #1). Compounded in Falmari, a name of the Teleri, and Mar-nu-Falmar, "Home/Land under Waves", a name of Númenor after the Downfall. (SA:falas) Falmari "wave-folk", a name of the Teleri (PM:386). In earlier "Qenya", falma was glossed "foam" (LT1:253, cf. MC:213). Compare also the early "Qenya" words falmar "wave as it breaks" (LT1:253), pl. falmari "waves" (MC:216)_