Policeman
Noun
じゅんさ
その巡査は、スコッチを一気にゴクリと半分飲み干した。
The policeman drank half the scotch in one gulp.
Those who patrol and inspect on their patrols are the police or policeman.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.