A Doriathrin (and Falathrin) noun for “beech (tree)”, a combination of gald “tree” and breth “(beech) mast” (Ety/GALAD, BERÉTH). The second element originally meant “beech”, but later meant “mast”; this original meaning seems to be preserved in this compound.
A Doriathrin noun for “beech (tree)”, properly referring to Hirilorn with a true meaning of “three trunks” (Ety/NEL). Tolkien indicated it was a combination of neld “three” and orn “tree”, though it is unclear why the final -n vanished. He marked this derivation with a “?” perhaps because of this uncertainty.