Strong's Concordance H5919

Original Word: עַכְשׁוּב
Transliteration: ʻakshûwb
Phonetic Spelling: ak-shoob'
probably from an unused root meaning to coil; an asp (from lurking coiled up); adder.

Usages throughout the bible

Psalms 140:3 - They have sharpened their tongues like a serpent; adders' H5919 poison is under their lips. Selah.