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

gadu

adjective. joined, connected

An adjective appearing as G. gadu “joined, connected” in the Gnomish Lexicon of the 1910s, based the early root ᴱ√yat- [ẎATA] (GL/36).

Neo-Sindarin: For purposes of Neo-Sindarin, I would update this to ᴺS. iannen “joined, connected”, the passive participle of ᴺS. ianna- “to join, connect”.