vt 1  :  to slacken or make less tense or rigid <alternately contracting and ing their muscles>   2  :  to relieve from nervous tension  3  :  to relieve from constipation < a mare's bowels by putting her on wet bran>  vi  1  of a muscle or muscle fiber  :  to become inactive and lengthen  2  :  to cast off social restraint, nervous tension, or anxiety <couldn't in crowds>  .
 
 
 
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