Sindarin 

úlam

adjective. dumb, unable to speak, (lit.) untongued

Elements

WordGloss
ú-“no, not, negative; impossible, no, not, negative; impossible; [N.] bad-”
lam“(physical) tongue; language, (physical) tongue; language, [G.] speech”
Sindarin Group: Eldamo - neologism/reconstructions. Published by