Early Quenya
hir
noun. inwards, interior, inside, heart
hi
pronoun. she; 3rd sg. fem. pronoun
heru
noun. lord
i-
prefix. she; 3rd sg. fem. pronoun
int
adverb. inwards
sindi
noun. river
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 noun in the Qenya Lexicon of the 1910s glossed “river” derived from the root ᴱ√SIŘI [SIÐI] (QL/84). The same word appeared in the contemporaneous Poetic and Mythological Words of Eldarissa (PME/84).