linta adj. "swift"; pl. lintë attested (PE17:63. Nam, RGEO:66) Cf. lintië.
Quenya
lintië
swiftness, speed
lintië
noun/adverb. swiftness, speed; swiftly, *quickly
linta
swift
linta
adjective. swift
-nen
most nouns have an instrumental in -nen
-nen instrumental ending (pl. -inen, dual -nten, partitive pl. -línen). Attested in ambartanen, lírinen, lintieryanen, súrinen, parmanen; see ambar (#2), lírë, lintië, súrë, parma. Tolkien noted that "most nouns have an instrumental in -nen" (PE17:62), a wording suggesting that the form of the ending may vary; given the normal development ln > ld, it is possible that it would appear as *-den when added to a noun in -l (*macilden "with a sword").
nornë lintië
he ran quickly
alarca
swift, rapid
alarca ("k")adj. "swift, rapid" (LAK2)
arauca
swift, rushing
arauca ("k")adj. "swift, rushing" (LT2:347). Compare arauco.
larca
swift, rapid
larca ("k")adj. "swift, rapid" (LAK2)
rindë
adjective. swift
tyelca
swift, agile
tyelca ("k")adj. "swift, agile" (KYELEK), "hasty" (PM:353)
lintië noun "swiftness, speed" derived from linta; also used as adverb "quickly", nornë lintië "he ran with swiftness", also more explicitly with pronominal suffixes and the instrumental ending -nen: lintieryanen "with his speed" (PE17:58)