An adjective for “lost” appearing in its plural form laithi in Gnomish translations of the name of The Book of Lost Tales: G. i·band a·gwentin laithi or i band cwention laithi from The Gnomish Grammar (GG/11-12). It is clearly related to the verb G. laitha- “let slip, lose” from the Gnomish Lexicon (GL/52).
Gnomish
lost
noun. blossom, bloom
loss
noun. blossom, bloom
laith
adjective. *lost
bandra
adverb. away, gone, departed, lost
haithin
adjective. gone, departed, lost
haim
adjective. gone, departed, lost
luitha-
verb. to bloom, blossom
A verb in the Gnomish Lexicon of the 1910s glossed “bloom” and “blossom” (GL/55), probably based on the early root ᴱ√LOHO [loχo] (GL/52; QL/55).
nil
adjective. empty
A noun in the Gnomish Lexicon of the 1910s glossed “blossom, bloom” (GL/54), probably based on the early root ᴱ√LOHO [loχo] (GL/52; QL/55). A form loss appeared next to (etymologically unrelated) G. lôs “flower” that might be a variant of lost (GL/52).