H3907 לָחַשׁ (law-khash')

KJV renderings: charmer, whisper (together).
Strong's definition: to whisper; by implication, to mumble aspell (as a magician)
Derivation: a primitive root;

From James Strong's public-domain dictionaries (H), JSON edition by OpenScriptures (CC-BY-SA). Every dotted-underline word in the text links here.