A hangover — that miserable morning-after feeling when your body reminds you exactly what you did last night. Also, the undertow that pulls you back toward the sea.
From Spanish 're-' (back, again) + 'sacar' (to take out), literally meaning 'to pull back.' Originally a maritime term for the undertow that pulls swimmers back toward the sea, it gained the metaphorical meaning of hangover — that feeling of being pulled back into misery after a night of celebration. The connection is perfect: both involve being dragged back by forces beyond your control.
I love how Spanish uses the SAME word for ocean undertow and hangover! Think about it — both involve that awful pulling sensation, that feeling of being dragged back against your will. Whether it's the sea pulling you out or last night's tequila pulling you into misery, 'resaca' captures that helpless, dragging sensation perfectly. It's poetry born from suffering, and somehow that makes it beautiful!
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