研

common

ケン/KEN/    と.ぐ/to.gu/KEN/ケン/    to.gu/と.ぐ/

polish;  study of;  sharpen

Radical: 石 (stone).   Strokes: 9画.   Elements: |口石亅廾ノ.   Pinyin: yán / yàn.   Hangul: 연 [yeon].   Nanori: のりnori.

Jōyō Kanji 3rd Grade.   JLPT N4.

Example compounds:
ケンKEN研鑽【けんさんkensan】diligent study; devoting oneself to one's studies
予研【よけんyoken】National Institute of Health
航空宇宙技術研究所【こうくううちゅうぎじゅつけんきゅうじょkōkūuchūgijutsukenkyūjo】National Aerospace Laboratory; NAL
とぐtogu研ぐ【とぐtogu】to sharpen; to wash (rice); to scour
牙を研ぐ【きばをとぐkibawotogu】to sharpen one's fangs
Codepoints and classification codes:
7814–Unicode
24-6–JIS X 0208
1-5-4–SKIP
5a4.1–TKD
1164.0–Four Corner
3355–De Roo
Dictionary indices:
3180–Classic Nelson
3991–The New Nelson Character Dictionary by A. Nelson
1132–New Japanese-English Character Dictionary by J. Halpern
771–Kanji Learner's Dictionary by J. Halpern
675–Remembering the Kanji by J. Heisig
426–A New Dictionary of Kanji Usage (Gakken)
875–Japanese Names by P.G. O'Neill
583–Essential Kanji by P.G. O'Neill
24080–Daikanwajiten 「大漢和辞典」 by T. Morohashi vol. 8 p. 348
272–A Guide to Remembering Japanese Characters by K.G. Henshall
896–Kanji & Kana by Spahn and Hadamitzky
204–Guide to Reading & Writing Japanese (H) by F. Sakade
231–Kanji Flashcards by M. Hodges and T. Okazaki
290–Guide to Reading & Writing Japanese: Third Edition 3rd edition by Henshall
325–Tuttle Kanji Cards by A. Kask
284–The Kanji Way to Japanese Language Power by D. Crowley
297–Kanji in Context by Nishiguchi and Kono
2.8–Japanese for Busy People by the AJLT
1398–Kodansha Compact Kanji Guide
682–Y. Maniette's French adaptation of Heisig
研