▼tn This passive participle or adjective is normally used to describe cities or walls as “fortified” or “inaccessible.” All the lexicons, however, agree in seeing it used here metaphorically of “secret” or “mysterious” things, things that Jeremiah could not know apart from the Lord’s revelation. G. L. Keown, P. J. Scalise, and T. G. Smothers (Jeremiah 26-52 [WBC], 170) make the interesting observation that the word is used here in a context in which the fortifications of Jerusalem are about to fall to the Babylonians; the fortified things in God’s secret counsel fall through answer to prayer.