pulji gismu

x₁ is a police officer/[enforcer/vigilante] enforcing law(s)/rule(s)/order x₂.

Police officer, as an agent of authority (= ca'irpulji, ka'irpulji), as part of a police force (= puljysoi, as part of puljyselsoi); military police (= jempulji, bilpulji). See also catni, sonci, bilni, flalu, bandu, jemna, zekri, krati.

In notes:

bandu: x₁ (event) defends/protects x₂ (object/state) from threat/peril/potential x₃ (event).
bilni: x₁ is military/regimented/is strongly organized/prepared by system x₂ for purpose x₃.
catni: x₁ has authority/is an official in/on/over matter/sphere/persons x₂ derived on basis x₃.
flalu: x₁ is a law specifying x₂ (state/event) for community x₃ under conditions x₄ by lawgiver(s) x₅.
jemna: x₁ is a gem/polished stone/pearl of type x₂ from gemstone/material/source x₃.
krati: x₁ represents/is an agent/proxy/stands-in for [absent] x₂ in matter(s)/function(s) x₃.
sonci: x₁ is a soldier/warrior/fighter of army x₂.
zekri: x₁ (event/state) is a punishable crime/[taboo/sin] to people/culture/judges/jury x₂.
jbobau zei po'o zei pulji: x₁ is the "J B O B A U P O h O" police.