en_tn_condensed/gen/06/14.md

an ark

This refers to a very large box that would be able to float on water even in a very bad storm. "a large boat" or "a ship" or "a barge"

cypress wood

People do not know exactly what kind of tree this was. "wood used for building boats" or "good wood"

cover it with pitch

The reason for doing this can be made explicit. Alternate translation: "spread pitch on it" or "paint tar on it" or "cover it with pitch to make it waterproof" (See: rc://en/ta/man/translate/figs-explicit)

pitch

This is a thick, sticky or oily liquid that people put on the outside of a boat to stop water from going through gaps in the wood into the boat.