'Silly' in the Bible

For wrath killeth the foolish man, and envy slayeth the silly one.

Ephraim also is like a silly dove without heart: they call to Egypt, they go to Assyria.

O you foolish and thoughtless and superficial Galatians, who has bewitched you [that you would act like this], to whom—right before your very eyes—Jesus Christ was publicly portrayed as crucified [in the gospel message]?

Are you so foolish and senseless? Having begun [your new life by faith] with the Spirit, are you now being perfected and reaching spiritual maturity by the flesh [that is, by your own works and efforts to keep the Law]?

and there must be no filthiness and silly talk, or coarse jesting, which are not fitting, but rather giving of thanks.

But have nothing to do with irreverent and silly myths. Rather, train yourself in godliness,

For of this sort are they which creep into houses, and lead captive silly women laden with sins, led away with divers lusts,