כָּפַר
From LSJ
Κακοῖς ὁμιλῶν καὐτὸς ἐκβήσῃ κακός → Facient malorum te malum commercia → Mit Schlechten Umgang pflegend wirst du selber schlecht
English (Strong)
a primitive root; to cover (specifically with bitumen); figuratively, to expiate or condone, to placate or cancel: appease, make (an atonement, cleanse, disannul, forgive, be merciful, pacify, pardon, purge (away), put off, (make) reconcile(-liation).