bless

From the earlier English bledsian and blod (blood), referring to the rite of consecration by sprinkling an altar with blood. Some chief definitions of the English verb "bless": (1) to make or declare holy by a spoken formula or a sign; hallow; consecrate; (2) to ask divine favor for; (3) to favor or endow with; (4) to make happy or prosperous; gladden; (5) to praise or glorify.

benediction

From the Latin bene (well) and dicere (to speak). The Latin verb benedicere means "to bless." Some chief definitions of the English noun "benediction": (1) a blessing; (2) an invocation (calling down) of divine blessing, especially at the end of a religious service; (3) blessedness.