fool(-ish, X -ishness)

Strong’s Dictionary of Greek Words:

Number:
3474 (find all occurrences in KJV Bible)
Greek:
μωρός
Transliteration:
moros
Phonic:
mo-ros’
Meaning:
probably from the base of 3466; dull or stupid (as if shut up), i.e. heedless, (morally) blockhead, (apparently) absurd
KJV Usage:
fool(-ish, X -ishness)