A suffix for “long” in the Qenya Lexicon of the 1910s with variants lēni or lēnu, both base on the early root ᴱ√LENE “long” (QL/53). These Qenya suffixes were also mentioned in the contemporaneous Gnomish Lexicon (GL/39).
Early Quenya
lenu-
verb. to stretch
-lénu
suffix. long
-léni
suffix. long
anda
adjective. long
andra
adjective. long
A verb glossed “stretch” in the Qenya Lexicon of the 1910s under the early root ᴱ√LENE “long” (QL/53).