Portuguese
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Etymology
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Literally, “so X, but so X, that Y”.
Adjective
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tão X, mas tão X, que Y
- (snowclone) the quality X (an adjective) to a high extent, leading to the conclusion Y
Estava tão frio, mas tão frio, que eu não queria sair de casa!- It was so cold, but so cold that I did not want to leave my home!