רֹאשׁ (rōʾš) is
a Hebrew noun
meaning venom. It appears
12 times
in 7 books of the Hebrew Bible
(Strong's H7219).
Also rendered
poison
Same Hebrew root (TWOT 2098)
Range of meaning (TWOT 2098)venom; poisonous plant, poppy, poison; gall, hemlock
Full entry: Brown-Driver-Briggs and Strong's
רֹאשׁnoun, masculine: venom
and רוֹשׁ noun, masculine a bitter and poisonous herb, then venom
Strong's H7219רֹאשׁ: a poisonous plant, probably the poppy (from its conspicuous head); generally poison (even of serpents) KJV:gall, hemlock, poison, venom.
Meanings: Brown-Driver-Briggs (1906) and Strong's Hebrew Dictionary (1890), public domain, via the Open Scriptures Hebrew Bible Project (CC BY 4.0). TWOT numbers for reference only.