公私

公私	gōng sī	public and private (interests, initiative etc)
公	gōng	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 / honorable (gentlemen) / father-in-law / male (animal)
私	sī	(bound form) personal; private / (bound form) selfish / (bound form) clandestine / (bound form) illicit / (Internet slang) to send a private message to sb