Meaning of Japanese Word "空洞" (Kudo)

Kanji in this word

Related words "空"

• 低空 (teiku)low altitude
• 空 (sora)sky
• 青空 (aozora)blue sky
• 星空 (hoshizora)starry sky
• 真空 (shinku)vacuum
• 空き缶 (akikan)empty can

Related words "洞"

• 洞 (hora)cave
• 洞穴 (horaana)cave
• 洞穴 (doketsu)cave
• 洞窟 (dokutsu)cave, cavern
• 空洞 (kudo)cave, hollow
• 洞察力 (dosatsuryoku)insight