This site will be taken down March 31st, 2026.

This was not an easy decision to make. For the last couple years, I have been struggling to find motivation for this site and to keep up with basic maintenance and security updates. With the rise of AI and more sophisticated tools, the usefulness of sites like this is questionable and traffic has nose-dived. I just don't have it in me to keep doing this. Thank you all for 10 years of support!

Zach

Word

ほら
cave; den; grotto
Word

空、洞
うろ、うつお、うつほ、うつせ
hollow; cavity; hole
Word

洞窟

どうくつ
cavern; cave; cave system; grotto
Word

空洞

くうどう
cave; hollow; cavity; hollow
Word

曹洞宗

そうとうしゅう
Soto school (of Zen Buddhism)
Word

洞察

どうさつ
discernment; insight
Word

洞穴

ほら穴
どうけつ、ほらあな
cave; den; grotto
Word

鍾乳洞

鐘乳洞
しょうにゅうどう
limestone cave; limestone cavern; limestone grotto
Word

風洞

ふうどう
wind tunnel
Word

洞門

どうもん
cave entrance; tunnel