Sindarin 

Glanduin

noun. border river

gland (“boundary”) + duin (“long and large river”) David Salo: “dh and mh were liable to revert to d and m when they came to follow a nasal after syncope” TolkLang message 19.31.

Sindarin [Tolkiendil] Group: Tolkiendil Compound Sindarin Names. Published by

glanduin

place name. Border-river

River marking the southern border of Eriador (LotR/1039), translated “Border-river” (UT/261, VT42/7). This name is combination of glan(n) “border” and duin “river” (VT42/7-8).

Elements

WordGloss
glan(n)“boundary”
duin“(large) river, (large) river; [N.] water”
Sindarin [LotRI/Glanduin; NM/378; RSI/Glanduin; SDI1/Glanduin; UT/261; UT/264; UTI/Glanduin; VT42/07] Group: Eldamo. Published by