Sentence:  The P.D.I. and later the Popular Movement protected the Istiqlal 's `` privileged position '' until the fall of Balafrej , and then the Istiqlal <WSD>used</WSD> the same argument , which it had previously ignored , against the pro U.N.F.P. tendencies of the Ibrahim government . 
Meaning of the word marked with <WSD> tags:  put into service; make work or employ for a particular purpose or for its inherent or natural purpose