pitch
Genesis 6:14
6:14 pitch. The ark (an ancient Hebrew word used also for the small box in which the infant Moses floated on the Nile) was made of a hard dense wood whose species has not yet been identified; it was made waterproof, not by a bituminous pitch (a different Hebrew word) but by some as-yet-unknown “covering.” The Hebrew word is kopher, equivalent to kaphar, frequently translated later as “atonement” (e.g., Leviticus 17:11). In providing a protective covering against the waters of judgment, it thus becomes a beautiful type of Christ.