Gnomish
nosta-
verb. to be born
nosteg
adjective. birth
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
A verb appearing as G. nosta- “am born” in the Gnomish Lexicon of the 1910s (GL/61), based on the early root ᴱ√NŌ “become, be born” (QL/66).
Neo-Sindarin: Sami Paldanius coined a neologism ᴺS. enia- “to be born, be generated, result” in the VQP (VQP) based on the root √ONO “be born”, from primitive ✱onya-. I prefer enia- “be born” over nosta- mostly to avoid conflict with the neologism ᴺS. nosta- “to smell”, for which I have no good replacement.