CONCEAL, L. To withhold from sight, G.,To conceal, and to heal the primary sense is to strain, hold, stop, restrain, make fast or strong, all from the same root as the Shemitic.
1. 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 .
2. 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 .
A party of men concealed themselves behind a wall. A mask conceals the face.