HSK7-9
zhòu
time as concept
Phonosemantic compound. 宀 represents the meaning and 由 represents the sound.
宀 Meaning component
mián
roof
由 Sound component
yóu
cause
Oracle script
Seal script
Clerical script
Regular script
宙
time as concept; infinite time; eternity; (geology) eon
宇宙
universe
宇宙飞船
spacecraft
宙斯
Zeus
eternity
宇宙观
world view
Academia Sinica
Make Me a Hanzi
Unicode
Dong Chinese
CC-CEDICT
SUBTLEX-CH
MTSU Chinese text computing