Lit., not to be held back. The proper reading, however, is ἀκατάστατον, unsettled. See on καθίσταται, hath its place, Jam 3:6. Rev., correctly, restless.
Deadly (θανατηφόρου)
Lit., death-bearing, or-bringing. Only here in New Testament.
Poison (ἰοῦ)
Rendered rust at Jam 5:3; and found only in these two passages and in Rom 3:13, in the citation of Psa 140:3.