Kanji1 / 9
洞 kanji
den, cave, excavation
- JLPT level
- N1 (unofficial)
- Strokes
- 9
- School grade
- Secondary school
On readings
ドウ
Kun readings
ほら
Words with 洞
LevelWord & meaningActions
- —空洞化making hollow; making meaningless; deindustrialization; deindustrialisation
- —洞察力insight; discernment; perception; perspicacity; acumen
- —石灰洞limestone cave
- —海食洞sea cave; marine cave
- —溶岩洞lava tube
- —洞結節sinus node; sinoatrial node
- —静脈洞venous sinus; sinus venosus
- —超空洞void
- —晶洞石geode
- —小洞燕sand martin (Riparia riparia)
- —洞調律sinus rhythm
- —洞房結節sinoatrial node
- —洞窟潜水cave diving
- —洞窟壁画cave painting
- —冠静脈洞coronary sinus
- —空洞化現象hollowing-out phenomenon
- —空洞共振器cavity resonator; microwave resonance cavity; rhumbatron
- —洞性不整脈sinus arrhythmia; irregular heartbeat
- —台湾小洞燕brown-throated martin (Riparia paludicola); brown-throated sand martin
- —冠状静脈洞coronary sinus