| 夙愿 | sù yuàn | long-cherished wish | |
| 夙夜 | sù yè | morning and night; always; at all times | |
| 夙兴夜寐 | sù xīng yè mèi | to rise early and sleep late (idiom); to work hard; to study diligently; to burn the candle at both ends | |
| 夙夜匪懈 | sù yè fěi xiè | to work from morning to night (idiom) | |
| 夙敌 | sù dí | old foe; long-standing enemy |
| 1 | It doesn't make any sense to get up so early. | |
| 2 | Are you an early bird or a night owl? | |
| 3 | Not tonight, I got an early day tomorrow. | |
| 4 | She woke early only to find it was raining . | |
| 5 | It goes without saying that it pays to keep early hours. |