Sentence:  `` It would make me feel a lot better , but the Woman 's Exchange is n't taking baked goods any more and I can n't leave the baby with Grandma because she <WSD>is</WSD> n't strong enough and the baby 's too young to be put in a nursery '' . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)