Early Noldorin
orthanc
adjective. unbroken, without break or cleavage, united, continuous; masked
Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
A word for “unbroken” and also “without break or cleavage, united, continuous” in Early Noldorin Word-lists of the 1920s (PE13/164-165), a combination of ᴱN. thanc with the privative prefix ᴱN. or-. In one place Tolkien said orthanc meant “unmasked” = ᴱN. {ithanc >>} idanc where the second element appears to be ᴱN. tanc (PE13/156), though the meaning of tanc in this period was “firm” (PE13/153) which seems inappropriate.