Strong’s Greek
G2287 — thanatephoros
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
θανατηφόρος
thanatephoros — pronounced than-at-ay'-for-os
from (the feminine form of) 2288 and 5342; death-bearing, i.e. fatal:--deadly. see GREEK for 2288 see GREEK for 5342
1 occurrence in the KJV.
James 3:8
But the tongue can no man tame; it is an unruly evil, full of deadly poison.