夙夜在公 sùyèzàigōng to work day and night Origin Definitions Defs Strokes Stroke Words Sentences Sents 夙夜 sùyè day and night (literary) from morning until night; at all times在 zài preposition to be at To be located at, in, or on; to be present or at home.公 gōng noun official (bound form) official business; government duties