foolish

from Α (as a negative particle) and a derivative of νοιέω; unintelligent; by implication, sensual:--fool(-ish), unwise.

from Α (as a negative particle) and φρήν; properly, mindless, i.e. stupid, (by implication) ignorant, (specially) egotistic, (practically) rash, or (morally) unbelieving:--fool(-ish), unwise.

probably from the base of μυστήριον; dull or stupid (as if shut up), i.e. heedless, (morally) blockhead, (apparently) absurd:--fool(-ish, X -ishness).

from אֱוִיל; silly, foolish; hence (morally) impious; foolish.

from נָבֵל; stupid; wicked (especially impious); fool(-ish, -ish man, -ish woman), vile person.