This word is glossed “grey” in The Etymologies, but perhaps means “✱foggy, overcast”, since Sindarin cognate hethw means “foggy, obscure, vague” and related noun hiswë means “fog”. @@@
Qenya
lasse
noun. leaf
lassekanta
adjective. leaf-shaped
lasselanta
noun. leaf-fall, autumn; October
lár
noun. ear
hiswa
adjective. grey, grey [of weather], *foggy, overcast; [ᴱQ.] dim, fading
lasta-
verb. to listen; to hear
An adjective for “leaf-shaped” in The Etymologies of the 1930s, a combination of ᴹQ. lasse “leaf” and ᴹQ. -kanta “-shaped” (Ety/KAT).