The meaning of “נָחָשׁ”

“And the Lord God said unto the woman, What is this that thou hast done? And the woman said, The serpent beguiled me, and I did eat.”

“Therefore the people came to Moses, and said, We have sinned, for we have spoken against the Lord, and against thee; pray unto the Lord, that he take away the serpents from us. And Moses prayed for the people.”

“He removed the high places, and brake the images, and cut down the groves, and brake in pieces the brasen serpent that Moses had made: for unto those days the children of Israel did burn incense to it: and he called it Nehushtan.”

“They have sharpened their tongues like a serpent; adders’ poison is under their lips. Selah.”

“Surely the serpent will bite without enchantment; and a babbler is no better.”