10 strokes
                                                    
                        Jouyou kanji
            Taught in 8th grade
    
                                                    JLPT exam level N1
                                            decline, wane, weaken
Kun'yomi
- お - と - ろ - え - る - to become weak 
On'yomi
- スイ 
Character Breakdown
References
| Unicode hex code | 8870 | 
| JIS X 0208 | 1-31-74 | 
| Nelson, A. Classic Nelson | 312 | 
| Haig, J. New Nelson Japanese-English Character Dictionary | 5432 | 
| Halpern, J. New Japanese-English Character Dictionary | 2100 | 
| Halpern, J. Kodansha Kanji Dictionary | 2604 | 
| Halpern, J. Kanji Learners Dictionary (Kodansha) | 1333 | 
| Halpern, J. Kanji Learners Dictionary (Kodansha), 2nd edition (2013) | 1806 | 
| Heisig, J. Remembering The Kanji | 1890 | 
| Heisig, J. Remembering The Kanji, Sixth Ed. | 2037 | 
| Gakken A New Dictionary of Kanji Usage | 1577 | 
| O'Neill, P.G. Essential Kanji | 1501 | 
| Morohashi Daikanwajiten | 34127 | 
| Henshall, K. A Guide To Remembering Japanese Characters | 1456 | 
| Spahn and Hadamitzky Kanji and Kana | 1676 | 
| Spahn and Hadamitzky Kanji and Kana (2011 edition) | 1791 | 
| Hodges & Okazaki Japanese Kanji Flashcards | 1725 | 
| Kask, A. Tuttle Kanji Cards | 1388 | 
| Nishiguchi & Kono Kanji in Context | 1805 | 
| Kodansha Kodansha Compact Kanji Guide | 1622 | 
| Maniette, Y. Les Kanjis dans la tete | 1908 | 
| Tuttle Dictionary Descriptor Code | 2j8.1 | 
| Four corner code | 0073.2 | 
| De Roo Code | 465 |