'Countenance' in the Bible

Then let our countenances be looked upon before thee, and the countenance of the youths that eat of the king's dainties; and as thou seest, deal with thy servants.

Then the king's countenance was changed in him, and his thoughts troubled him; and the joints of his loins were loosed, and his knees smote one against another.

Then was king Belshazzar greatly troubled, and his countenance was changed in him, and his lords were perplexed.

Now the queen by reason of the words of the king and his lords came into the banquet house: the queen spake and said, O king, live forever; let not thy thoughts trouble thee, nor let thy countenance be changed.

Here is the end of the matter. As for me, Daniel, my thoughts much troubled me, and my countenance was changed in me: but I kept the matter in my heart.

And in the latter time of their kingdom, when the transgressors are come to the full, a king of fierce countenance, and understanding dark sentences, shall stand up.