'Tight' in the Bible

After giving them a severe beating, they threw them in jail and ordered the jailer to keep them under tight security.

“For the heart (the understanding, the soul) of this people has become dull (calloused),And with their ears they scarcely hear,And they have shut their eyes [to the truth];Otherwise they might see with their eyes,And hear with their ears,And understand with their heart and return [to Me],And I would heal them.”’