-par·tism
\|pär]ˌtizəm, |pȧ] also ]d.ˌizəm\  noun combining form 
(-s) 
Etymology: French -partisme, from parti political party (from Middle French, match, party, decision) + -isme — more at parti 
 : tendency toward or active operation of a (specified) number of political parties in a governmental system 
< multi-partism >
< multi-partism >