couch

Concise Oxford English Dictionary © 2008 Oxford University Press:
couch1 /kaʊtʃ/

▶noun a long upholstered piece of furniture for several people to sit on.

■ a reclining seat with a headrest at one end on which a psychoanalyst's subject or doctor's patient lies while undergoing treatment.

▶verb

• 1 (usu. be couched in) express in language of a specified style.

• 2 literary lie down.

• 3 archaic lower (a spear) to the position for attack.

• 4 chiefly historical treat (a cataract) by pushing the lens of the eye downwards and backwards, out of line with the pupil.

• 5 (in embroidery) fix (a thread) to a fabric by stitching it down flat with another thread.

– origin ME: from OFr. couche (n.), coucher (v.), from L. collocare (see collocation).

Concise Oxford English Dictionary © 2008 Oxford University Press:
couch2 /kaʊtʃ, kuːtʃ/ (also couch grass)

▶noun a coarse grass with long creeping roots. [Elymus repens and other species.]

– origin C16: var. of quitch.