productive

Concise Oxford English Dictionary © 2008 Oxford University Press:
productive/prəˈdʌktɪv/

▶adjective

• 1 producing or able to produce large amounts of goods, crops, etc.

  ■ relating to or engaged in the production of goods, crops, etc.

• 2 achieving or producing a significant amount or result.

• 3 (productive of) producing.

• 4 Linguistics (of a prefix, suffix, etc.) currently used in forming new words or expressions.

• 5 Medicine (of a cough) raising mucus from the respiratory tract.

– derivatives
productively adverb,
productiveness noun.

– origin C17: from Fr. productif, -ive or late L. productivus, from product-, producere (see produce).