驂
                                                            21 strokes
                                                    
                        Kentei exam level 1
    
                                            extra driver or horse
Kun'yomi
そえうま 
On'yomi
サン 
Main Radical
馬(KanXi)
Character Breakdown
extra driver or horse
サン そえうま (Kentei 1)
horse
ま バ うま (2nd, N3)
References
| Unicode hex code | 9A42 | 
| JIS X 0208 | 1-81-61 | 
| Haig, J. New Nelson Japanese-English Character Dictionary | 6769 | 
| Morohashi Daikanwajiten | 44965 | 
| Tuttle Dictionary Descriptor Code | 10a11.2 | 
| Four corner code | 7332.2 |