Strong’s Greek
G1338 — diikneomai
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
διϊκνέομαι
diikneomai — pronounced dee-ik-neh'-om-ahee
from 1223 and the base of 2425; to reach through, i.e. penetrate:--pierce. see GREEK for 1223 see GREEK for 2425
1 occurrence in the KJV.
Hebrews 4:12
For the word of God is quick, and powerful, and sharper than any twoedged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart.