To push, fold, or fit something into a small space or under something else; to make something neat and compact.
From Middle English 'tukken,' possibly from Old English 'tūcan' meaning to pull or stretch. Related to the action of tucking fabric when sewing.
Tucking a child into bed is actually ancient parenting technology—the action of being physically restrained and held down reduces cortisol (stress hormone) and triggers the parasympathetic nervous system, making you literally sleepier.
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