1. Overview of Meaning
The kanji “洞” (pronounced “dou”) means “cave” or “hollow.” It refers to a natural underground space or a hollow area within a solid object.
2. Formation and Radical
Formation of the Kanji: The kanji “洞” is a phonetic-ideographic character (形声文字). It combines the meaning of a cave with phonetic elements to convey its sound.
Radical: The radical for “洞” is “穴” (an), which means “hole” or “cave.” This radical is often associated with words related to hollow spaces.
3. Examples of Usage
Common Words and Phrases:
- 洞窟 (どうくつ, doukutsu) – cave
- 洞穴 (どうけつ, douketsu) – cavern
Example Sentences in Daily Conversation:
- 「山の中に大きな洞窟があります。」(There is a large cave in the mountain.)
- 「この洞はとても深いです。」(This cave is very deep.)
4. Synonyms and Antonyms
Similar Kanji:
- 穴 (あな, ana) – hole; refers to a smaller opening compared to “洞.”
- 窟 (くつ, kutsu) – grotto; often implies a smaller or more decorative cave.
Antonyms:
- 山 (やま, yama) – mountain; represents a solid, elevated landform, contrasting with the hollow nature of “洞.”
5. Cultural and Historical Background
Relation to Japanese Culture: Caves have been significant in Japanese history and mythology, often seen as places of refuge or spiritual significance.
Proverbs and Idioms:
- 「洞窟の中の宝」(A treasure in a cave) – signifies hidden potential or value that is not immediately visible.