Sentence:  In West Africa , for example , where meat is a luxury and babies must be <WSD>weaned</WSD> early to make room at the breast for later arrivals , a childhood menace is kwashiorkor , or `` red Johnny '' , a growth-stunting protein deficiency ( signs : reddish hair , bloated belly ) that kills more than half its victims , leaves the rest prey for parasites and lingering tropical disease . 
Meaning of the word marked with <WSD> tags:  gradually deprive (infants and young mammals) of mother's milk