Middle Primitive Elvish
kham
root. call to, summon, name by name
kham
root. sit (down)
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 root that was a later entry in The Etymologies of the 1930s glossed “call to, summon, name by name” and having rejected variants ᴹ√KHAL², ᴹ√KYAM and ᴹ√KHEM. Tolkien’s introduction of this root seems to have caused him to restore ᴹ√KHAD over ᴹ√KHAM “sit”; see the entry on √KHAD for further discussion. Meanwhile, ᴹ√KHAM² was probably introduced to explain ᴹQ. nahamna “summoned” in the version of the Lament of Atalante from the 1930s (LR/47). The phrase where it appeared underwent quite a few changes thereafter, ultimately becoming ar Sauron túle nukumna Númenórenna “and Sauron came humbled [to Númenor]” by the 1940s, so the future status of ᴹ√KHAM² “summon” is unclear.
It is a useful root for purposes of Neo-Eldarin, however, and I think it is worth retaining.