sole

Concise Oxford English Dictionary © 2008 Oxford University Press:
sole1

▶noun

• 1 the underside of a person's foot.

  ■ the section forming the underside of a piece of footwear.

• 2 the underside of a tool or implement, e.g. a plane or the head of a golf club.

• 3 the floor of a ship's cabin or cockpit.

▶verb put a new sole on (a shoe).

– derivatives
-soled adjective.

– origin ME: from OFr., from L. solea ‘sandal, sill’, from solum ‘bottom, pavement, sole’.

Concise Oxford English Dictionary © 2008 Oxford University Press:
sole2

▶noun (pl. same) an edible marine flatfish. [Several species in the families Soleidae, Pleuronectidae, and Bothidae.]

– origin ME: from OFr., from Provençal sola, from L. solea (see sole1), named from its shape.

Concise Oxford English Dictionary © 2008 Oxford University Press:
sole3

▶adjective

• 1 one and only.

  ■ belonging or restricted to one person or group.

• 2 archaic (especially of a woman) unmarried.

  ■ alone.

– origin ME: from OFr. soule, from L. sola, fem. of solus ‘alone’.