Webster's English Dictionary

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disintegrate

dis.in.te.grate \(')dis-'int-*-.gra-t\ \(.)dis-.int-*-'gra--sh*n\ 
   \(')dis-'int-*-.gra-t-iv\ \-.gra-t-*r\ vt 1: to break or decompose into 
   constituent elements, parts, or small partic les 2: to destroy the unity or 
   integrity of  1: to break or separate into constituent elements or parts  
   2: to lose unity or integrity by or as if by breaking into parts  3: to 
   undergo a change in composition {an atomic nucleus that ~ s because of 
   radioactivity} - dis.in.te.gra.tion n