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!
Gnomish
ethl(in)
noun.ivy
A noun appearing as G. ethl(in) “ivy” in the Gnomish Lexicon of the 1910s derived from primitive ᴱ✶etḷ-, where tl became thl in Gnomish of the 1910s (GL/33).
Neo-Sindarin: There is no sign of tl > thl in later Sindarin, so I would adapt this word as ᴺS. edol “ivy” for purposes of Neo-Sindarin.
A noun appearing as G. ethl(in) “ivy” in the Gnomish Lexicon of the 1910s derived from primitive ᴱ✶etḷ-, where tl became thl in Gnomish of the 1910s (GL/33).
Neo-Sindarin: There is no sign of tl > thl in later Sindarin, so I would adapt this word as ᴺS. edol “ivy” for purposes of Neo-Sindarin.