To keep close or secret; to forbear to disclose; to withhold from utterance or declaration; as, to conceal ones thoughts or opinions. I have not concealed the words of the Holy One. Job 6:10.

To hide; to withdraw from observation; to cover or keep from sight. What profit is it if we slay our brother and conceal his blood? Genesis 37:26. A party of men concealed themselves behind a wall. A mask conceals the face.