1: ἰός
(Strong's #2447 — Noun Masculine — ios — ee-os' )

denotes "something active" as (a) "rust," as acting on metals, affecting their nature, James 5:3; (b) "poison," as of asps, acting destructively on living tissues, figuratively of the evil use of the lips as the organs of speech, Romans 3:13; so of the tongue, James 3:8 .