夜不归宿

Traditional form:

夜不歸宿

Pinyin (reading):

yèbùguīsù

Definitions:

• to stay out all night (idiom)

Characters:

• 夜 - night, dark; under cover of night
• 不 - no, not, un-; negative prefix
• 归 - to return, to go back; to return to, to revert
• 宿 - to stop, to rest, to lodge; constellation

Traditional characters:

• 夜 - night, dark; under cover of night
• 不 - no, not, un-; negative prefix
• 歸 - to return, to go back; to return to, to revert
• 宿 - to stop, to rest, to lodge; constellation