adder (Hebrew #5919)

Psalm
140:3   They have sharpened
shanan (Hebrew #8150)
to point (transitive or intransitive); intensively, to pierce; figuratively, to inculcate
KJV usage: prick, sharp(-en), teach diligently, whet.
Pronounce: shaw-nan'
Origin: a primitive root
their tongues
lashown (Hebrew #3956)
also (in plural) feminine lshonah {lesh-o-naw'}; from 3960; the tongue (of man or animals), used literally (as the instrument of licking, eating, or speech), and figuratively (speech, an ingot, a fork of flame, a cove of water)
KJV usage: + babbler,bay, + evil speaker, language, talker, tongue, wedge.
Pronounce: law-shone'
Origin: or lashon {law-shone'}
like a serpent
nachash (Hebrew #5175)
a snake (from its hiss)
KJV usage: serpent.
Pronounce: naw-khawsh'
Origin: from 5172
; adders’
`akshuwb (Hebrew #5919)
an asp (from lurking coiled up)
KJV usage: adder.
Pronounce: ak-shoob'
Origin: probably from an unused root meaning to coil
poison
chemah (Hebrew #2534)
from 3179; heat; figuratively, anger, poison (from its fever)
KJV usage: anger, bottles, hot displeasure, furious(-ly, -ry), heat, indignation, poison, rage, wrath(- ful). See 2529.
Pronounce: khay-maw'
Origin: or (Dan. 11:44) chemaC {khay-maw'}
is under their lips
saphah (Hebrew #8193)
probably from 5595 or 8192 through the idea of termination (compare 5490); the lip (as a natural boundary); by implication, language; by analogy, a margin (of a vessel, water, cloth, etc.)
KJV usage: band, bank, binding, border, brim, brink, edge, language, lip, prating, ((sea-))shore, side, speech, talk, (vain) words.
Pronounce: saw-faw'
Origin: or (in dual and plural) sepheth {sef-eth'}
. Selah
celah (Hebrew #5542)
suspension (of music), i.e. pause
KJV usage: Selah.
Pronounce: seh'-law
Origin: from 5541
.