in diepe slaap verzinken (ww):
das Bewusstsein verlieren(en) fall suddenly into a very deep sleep., einschlafen(en) fall suddenly into a very deep sleep., ohnmächtig werden(en) fall suddenly into a very deep sleep., weg sein(en) fall suddenly into a very deep sleep., wegtreten(en) fall suddenly into a very deep sleep.
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Via: Memodata.com