Strong’s Greek
G3642 — oligopsuchos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ὀλιγόψυχος
oligopsuchos — pronounced ol-ig-op'-soo-khos
from 3641 and 6590; little-spirited, i.e. faint-hearted:--feebleminded. see GREEK for 6590 see GREEK for 3641
1 occurrence in the KJV.
1 Thessalonians 5:14
Now we exhort you, brethren, warn them that are unruly, comfort the feebleminded, support the weak, be patient toward all men.