Early Quenya
yara
noun. a gloom, blight, lowering darkness
aire
adjective. old
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.
This word appeared in the Qenya Lexicon of the 1910s as ᴱQ. yara “a gloom, blight, lowering darkness” under the early root ᴱ√YAÐA (QL/105). In the Gnomish Lexicon of the 1910s, an alternate form yaru appeared as a cognate of G. gath “gloom, blight” (GL/37), and in an early name list yáru was the final element in ᴱQ. Fuiyáru “deadly nightshade” (PE15/14).