כַּפֹּרֶתkappôreth

propitiatory, late technical word from כּפר cover over sin (Exodus 25:17; Exodus 25:18; Exodus 25:19; Exodus 25:20; Exodus 25:21)

Pronunciation: kap-po'-reth · Hebrew/Aramaic (Old Testament) · H3727

Same root

כָּפַרkâphar · H3722to cover (specifically with bitumen); figuratively, to expiate or condone, to placate or cancel

Where it appears

Appears 27 times in the Bible.

Exodus 25:17 “Then make the Ark’s cover—the place of atonement—from pure gold. It must be 45 inches long and 27 inches wide.
Exodus 25:18 Then make two cherubim from hammered gold, and place them on the two ends of the atonement cover.
Exodus 25:19 Mold the cherubim on each end of the atonement cover, making it all of one piece of gold.
Exodus 25:20 The cherubim will face each other and look down on the atonement cover. With their wings spread above it, they will protect it.
Exodus 25:21 Place inside the Ark the stone tablets inscribed with the terms of the covenant, which I will give to you. Then put the atonement cover on top of the Ark.
Exodus 25:22 I will meet with you there and talk to you from above the atonement cover between the gold cherubim that hover over the Ark of the Covenant. From there I will give you my commands for the people of Israel.

See every passage

Exodus 25:17, 25:18, 25:19, 25:20, 25:21, 25:22, 26:34, 30:6, 31:7, 35:12, 37:6, 37:7, 37:8, 37:9, 39:35, 40:20
Leviticus 16:2, 16:13, 16:14, 16:15
Numbers 7:89
1 Chronicles 28:11

Source: Brown, Driver and Briggs, Hebrew and English Lexicon of the Old Testament (1906), public domain; markup by unfoldingWord, CC BY (github.com/unfoldingWord/Brown-Driver-Briggs-Enhanced).