'Thoughtless' in the Bible

I tell you, on Judgment Day people will give an account for every thoughtless word they have uttered,

Five of them were foolish [thoughtless, silly, and careless], and five were wise [far-sighted, practical, and sensible].

Both to Greeks and to foreigners, both to wise and to thoughtless, I am a debtor,

O thoughtless Galatians, who did bewitch you, not to obey the truth -- before whose eyes Jesus Christ was described before among you crucified?

so thoughtless are ye! having begun in the Spirit, now in the flesh do ye end?

Therefore do not be foolish and thoughtless, but understand and firmly grasp what the will of the Lord is.

for we were once -- also we -- thoughtless, disobedient, led astray, serving desires and pleasures manifold, in malice and envy living, odious -- hating one another;