plump

Concise Oxford English Dictionary © 2008 Oxford University Press:
plump1

▶adjective full and rounded in shape.

■ (of a person) rather fat.

▶verb (often plump something up) make or become full and round.

– derivatives
plumpish adjective,
plumply adverb,
plumpness noun,
plumpy adjective.

– origin C15 (in the sense ‘blunt, forthright’): rel. to MDu. plomp, Mid. Low Ger. plump ‘blunt, obtuse’.

Concise Oxford English Dictionary © 2008 Oxford University Press:
plump2

▶verb

• 1 (often plump something down) set or sit down heavily or unceremoniously.

• 2 (plump for) decide definitely in favour of (one of two or more possibilities).

▶noun archaic an abrupt plunge or heavy fall. ▶adverb informal

• 1 with a sudden or heavy fall.

• 2 dated directly and bluntly.

– origin ME: rel. to Mid. Low Ger. plumpen, MDu. plompen ‘fall into water’, prob. of imitative origin.