2191 - echidna

Strong's Concordance

Original word: ἔχιδνα
Transliteration: echidna
Definition (short): vipers
Definition (full): a viper

NAS Exhaustive Concordance

Word Origin: from echis (a viper, adder)
Definition: a viper
NASB Translation: viper (1), vipers (4).
NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries.
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Strong's Exhaustive Concordance

Of uncertain origin; an adder or other poisonous snake (literally or figuratively) -- viper.

References

Strong's 2191: 5 Occurrences
KJV: But when he saw many of the Pharisees and Sadducees come to his baptism, he said unto them, O generation of vipers, who hath warned you to flee from the wrath to come?
NASB: But when he saw many of the Pharisees and Sadducees coming for baptism, he said to them, "You brood of vipers, who warned you to flee from the wrath to come?
KJV: O generation of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh.
NASB: "You brood of vipers, how can you, being evil, speak what is good? For the mouth speaks out of that which fills the heart.
KJV: Ye serpents, ye generation of vipers, how can ye escape the damnation of hell?
NASB: "You serpents, you brood of vipers, how will you escape the sentence of hell?
KJV: Then said he to the multitude that came forth to be baptized of him, O generation of vipers, who hath warned you to flee from the wrath to come?
NASB: So he began saying to the crowds who were going out to be baptized by him, "You brood of vipers, who warned you to flee from the wrath to come?
KJV: And when Paul had gathered a bundle of sticks, and laid them on the fire, there came a viper out of the heat, and fastened on his hand.
NASB: But when Paul had gathered a bundle of sticks and laid them on the fire, a viper came out because of the heat and fastened itself on his hand.