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infertile

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definition: 
(Of a person, animal, or plant) unable to reproduce itself; unable to have young;(Of land) unable to sustain crops or vegetation
sentence: 
The sperm of the altered mice were less vigorous than normal, and the mice were completely infertile. These were farms so small or with such infertile land as to be unable to support a family at a minimum standard of living. barren and infertile soils.
difficulty: 
medium
toefl frequency: 
2
toefl classification: