KUU / a(ku) / a(keru) / kara / sora
sky, air, empty
JLPT Level 3
Jouyou Kanji, Kyouiku Grade 1
As seen in:
sora - sky
sorairo - sky blue
yozora - night sky
kara - empty
karate - karate (empty hand)
kuuki - air
kuukou - airport
kuuchuu - midair
Not to be confused with:
KYUU / kiwa(meru) - to study exhaustively