Early Quenya
santa
adjective. dear, beloved
sanda
adjective. that
santo
pronoun. that
mel(i)na
adjective. dear
melin
adjective. dear, beloved
ne
conjunction. that
sa
pronoun. that (there)
ta
pronoun. that (there)
tanya
adjective. that
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.