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

Readings

Kana: オウ、くぼ.む、へこ.む、ぼこ
Romaji: ou, kubo.mu, heko.mu, boko
Kana
Romaji

Meanings

concave, hollow, sunken

Stroke Diagram

12345

Kanji Info

Stroke Count:  5
Radical Number:  17
Frequency:  2206
Grade:  8
Skip Pattern:  4-5-1
Korean Reading:  yo
Chinese Reading:  wa1
Unicode:  51f9
JIS:  317A

Indexes

Halpern Index: 3482
Nelson Index: 664
New Nelson Index: 444
Spahn Hadamitzky Index: 0a5.14
Four Corner Index: 7777.0
Guide to Remembering Index: 1032
Gakken Index: 1920
Daikanwanjiten Index: 1810
Daikanwanjiten Index and Page: 2.0175
Remembering the kanji Index: 33
Kanji Flashcards Index: 1087
Kodansha Compact Index: 173
Kanji in Context Index: 1922
1999 Kanji Learners Index: 2170
2013 Kanji Learners Index: 2924
French Remembering the Kanji Index: 33
Remembering the Kanji 6th Index: 33
Essential Kanji Index: 1883
Kodansha Kanji Index: 4294
Roo 2001 Kanji Index: 3675
Tuttle Kanji Cards Index: 1039

Words

(おう)
concave; hollow; sunken
凹凸 (おうとつ)
unevenness; roughness; ruggedness
窪む (くぼむ)
to cave in; to become depressed; to sink
凹面 (おうめん)
concavity; concave; concavo
凹版印刷 (おうはんいんさつ)
intaglio printing
(くぼ)
hollow; cavity; sunken place; vagina; female genitalia
凹む (へこむ)
to be dented; to be indented; to yield to; to give; to sink; to collapse; to cave in; to be overwhelmed; to feel down; to be forced to yield; to be daunted; to be snubbed
凸凹 (でこぼこ、とつおう、だくぼく)
unevenness; roughness; ruggedness; inequality
凹版 (おうはん、おうばん)
intaglio (printing)
凹溜まり (くぼたまり)
hollow; pond in a hollow
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