The Hebrew word חֶסֶד (checed) occurs 248 times in 241 verses, and in 28 of the 39 OT books. Clearly, it is an important theme.
The word first appears in Genesis 19:19
Now behold, your servant has found favor in your sight, and you have magnified your lovingkindness (checed), which you have shown me by saving my life; but I cannot escape to the mountains, for the disaster will overtake me and I will die.
But in Leviticus 20:17, the meaning seems to be opposite:
If there is a man who takes his sister, his father's daughter or his mother's daughter, so that he sees her nakedness and she sees his nakedness, it is a disgrace (checed); and they shall be cut off in the sight of the sons of their people.
Is chesed an auto-antonym?
Consider the Hebrew word "elohim".
Genesis 1:1 In the beginning God [elohim] created the heavens and the earth.
Exodus 12:12 "On that same night I will pass through Egypt and strike down every firstborn of both people and animals, and I will bring judgment on all the gods [elohim] of Egypt. I am the LORD.
The meanings behind these two usages of "elohim" are quite opposite to each other.