■ adjective strongly wanting to do or have something.
↘keenly expectant or interested.
Phrases
~ beaver informal an enthusiastic person who works very hard.
Derivatives
~ly adverb
~ness noun
Origin
ME (also in the sense 'pungent, sour'): from OFr. aigre 'keen', from L. acer , acr- 'sharp, pungent'.