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Pronunciation varies by accent · noun
An uncle of one's grandparent (i.e. a brother or brother-in-law of one's great-grandparent).
Use great-granduncle when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Great-granduncle means An uncle of one's grandparent (i.e. a brother or brother-in-law of one's great-grandparent).
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use great-granduncle where its definition matches the intended context.
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