A Doriathrin adjective meaning “empty” attested only as an element in the name Dor. Mablost (Ety/KAB). Its Quenya cognate lusta suggests a primitive form ✱✶lustā, with the [o] developing from Ilkorin a-affection. It might be a Doriathrin-only variant of more general Ilkorin losgen “empty”.
Doriathrin
losgen Reconstructed
adjective. empty
lost Reconstructed
adjective. empty
An adjective meaning “empty” attested only as an element in the Ilkorin name Mablosgen (Ety/MAP). As suggested by Helge Fauskanger, it might be a combination of Dor. lost and the adjective suffix -en, but if so it is unclear where the medial g came from (AL-Ilkorin/Mablosgen). Alternately, perhaps losgen is the general Ilkorin adjective for “empty” and lost is a variant used only in the Doriathrin dialect.