公用

public / for public use

public / collectively owned / common / international (e.g. high seas, metric system, calendar) / make public / fair / just / Duke, highest of five orders of nobility 五等爵位[wu3 deng3 jue2 wei4] / honorable (gentlemen) / father-in-law / male (animal)

to use / to employ / to have to / to eat or drink / expense or outlay / usefulness / hence / therefore

public phone / CL:部[bu4]

public switched telephone network / PSTN