-clast
that which breaks or destroys, composed of fragments:
that which breaks or destroys, composed of fragments:
iconoclast, cranioclast, pyroclast
-clast
I.\ˌklast, -aa(ə)st, -aist\  noun combining form 
(-s) 
Etymology: Medieval Latin -clastes, from Middle Greek -klastēs, from Greek klan to break — more at gladiator 
1. : one that breaks or destroys 
< iconoclast >
< biblioclast >
2.[German -klast, from Medieval Latin -clastes]   : something that breaks or destroys ; especially  : a tool for breaking 
< cranioclast >
II.noun combining form 
(-s) 
Etymology: back-formation from -clastic (II)  
 : rock composed of fragmental material (of a specified type) 
< pyroclast >
< cataclast >
I.
1.
< iconoclast >
< biblioclast >
2.
< cranioclast >
II.
< pyroclast >
< cataclast >
-clast
Suffix
- something that breaks or destroys.
Etymology
From Ancient Greek κλαστός (klastós, “broken”), verbal adjective of κλάω (kláō, “to break”).