Strong's Greek #2191 - ἔχιδνα, ης, ἡ echidna (a viper)

viper.

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

Strong's 2191: ἔχιδνα

ἔχιδνα, ἐχιδνης, ἡ, a viper: Acts 28:3 (Hesiod, Herodotus, Tragg., Aristophanes, Plato, others); γεννήματα ἐχιδνῶν offspring of vipers (anguigenae, Ovid, metam. 3,531), addressed to cunning, malignant, wicked men: Matthew 3:7; Matthew 12:34; Matthew 23:33; Luke 3:7.

Strong's Greek: 2191. ἔχιδνα (echidna) — 5 Occurrences

Matthew 3:7 - N-GFP
GRK: αὐτοῖς Γεννήματα ἐχιδνῶν τίς ὑπέδειξεν
NAS: to them, You brood of vipers, who
KJV: O generation of vipers, who
INT: to them Brood of vipers who forewarned

Matthew 12:34 - N-GFP
GRK: γεννήματα ἐχιδνῶν πῶς δύνασθε
NAS: You brood of vipers, how can
KJV: O generation of vipers, how can ye,
INT: Offspring of vipers how are you able

Matthew 23:33 - N-GFP
GRK: ὄφεις γεννήματα ἐχιδνῶν πῶς φύγητε
NAS: you brood of vipers, how
KJV: [ye] generation of vipers, how
INT: [You] serpents offspring of vipers how shall you escape

Luke 3:7 - N-GFP
GRK: αὐτοῦ Γεννήματα ἐχιδνῶν τίς ὑπέδειξεν
NAS: by him, You brood of vipers, who
KJV: O generation of vipers, who
INT: him Offspring of vipers who forwarned

Acts 28:3 - N-NFS
GRK: τὴν πυράν ἔχιδνα ἀπὸ τῆς
NAS: them on the fire, a viper came
KJV: there came a viper out of
INT: the fire a viper out of the