长天老日 chángtiānlǎorì endless daytime Origin Definitions Defs Strokes Stroke Words Sentences Sents 长 長 cháng adjective long long in space or time; lasting天 tiān noun day a period of twenty-four hours; also used as a measurement for days or a specific time of day老 lǎo adverbadjective very very; quite; for a long time日 rì nounadverb daytime daytime; the period between sunrise and sunset as opposed to night