Early Primitive Elvish
ya
root. *and
ya
root. demonstrative pointing back
elménd(i)ya
adjective. elménd(i)ya
-ya
suffix. present
liya
root. unite many as one
dya
root. demonstrative pointing back
(d)ye
root. demonstrative pointing back
vī
root. as
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.