'Concealed' in the Bible

Whenthey heard the voice of the LORD God as he was walking in the garden during the breeze of the day, the man and his wife concealed themselves from the presence of the LORD God among the trees of the garden.

She said to the servant, “Who is that man there walking across the field to meet us?” And the servant said, “He is my master [Isaac].” So she took a veil and covered herself [as was customary].

And Judah saith unto his brethren, 'What gain when we slay our brother, and have concealed his blood?

So she took off her mourning apparel, covered herself with a shawl, and concealed her outward appearance. Then she went out and sat at the entrance of Enaim, which is on the way to Timnah, because she knew that even though Shelah had grown up, she wasn't being given to him as his wife.

When Judah saw her, he thought she was a prostitute, since she had concealed her face.