Usage Note
aufseufzen is separable and describes producing a single, audible sigh — more emphatic and sudden than the continuous seufzen. The prefix auf- signals an outward release. Common in literary prose to convey a single moment of relief or resignation.
Examples
"Sie seufzte erleichtert auf, als sie die gute Nachricht hörte."
Natural Translation
She heaved a sigh of relief when she heard the good news.
Literal Translation
She sighed relieved up, when she the good news heard.

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