A person or device that cares for someone lying in bed; also in printing, a tool or person that performs the couching process.
From couch (to lie down) + -er (agent suffix meaning 'one who does'), referring to one who tends to those in bed or performs laying-down processes.
Before modern hospitals, a coucher was an actual job—caring for bedridden patients required specific skills in turning, cleaning, and feeding someone who couldn't move, making couchering a skilled profession in wealthy households.
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