One of the mysteries of the English language finally explained.
with object (Chiefly refl.) To ingratiate again.
Mid 17th century; earliest use found in Thomas Herbert. From re- + ingratiate. Perhaps compare Italian ringraziare, † ringratiare to thank (a person), to give thanks to (a person); however, neither the sense of the English verb nor the reflexive use appear to be paralleled in Italian.
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