'Slow' in the Bible

For a number of days we sailed slowly and arrived with difficulty off Cnidus; then, because the wind did not allow us to go farther, we sailed under the leeward (sheltered) side of Crete, off Salmone;

For the heart of this people has become fat and their ears are slow in hearing and their eyes are shut; for fear that they might see with their eyes and give hearing with their ears and become wise in their hearts and be turned again to me, so that I might make them well.