/
dɪˈsəʊʃɪeɪt, 
-sɪ-/
v.
   - disconnect or separate. 
▸
(dissociate oneself from)
 declare that one is not connected with or a supporter of.
 - Psychiatry  cause (a component of mental activity) to undergo dissociation.
 - Chemistry  undergo or cause to undergo dissociation.
 
Derivative
Etymology
C16: from L. dissociat-, dissociare ‘to separate’.