Qenya
sir-
verb. to flow
he
pronoun. they
mandu
noun. lord
se
pronoun. they
síre
noun. river
ti
pronoun. they
toi
pronoun. they
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 for “flow” in The Etymologies of the 1930s under the root ᴹ√SIR of the same meaning (Ety/SIR). It may have appeared later in its present-tense form síra in the Quenya Verbal System (QVS) from 1948 as part of the sentence [ᴹQ.] númen Endorello isse sí Vaia síra “westward of Middle-earth where now Ocean flows” (PE22/126). However, it is possible that síra was intended to be present of the verb [ᴹQ.] sirya- “flow” from elsewhere in QVS; see that entry for discussion.
Conceptual Development: The Qenya Lexicon of the 1910s had ᴱQ. siri- “flow” under the early root ᴱ√SIŘI [SIÐI] (QL/84). See also the later verb Q. sirya-.