From Japanese-English FreeDict Dictionary ver. 0.1:
[news1] [nf03] 制 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, [news1] [nf03] せい /sˈe̞i/
(noun (common) (futsuumeishi))
(noun, used as a suffix)
system, organization, organisation, imperial command, laws, regulation, control, government, suppression, restraint, holding back, establishment