Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. suffrāgo, ĭnis, f. [sub-frag, frango]. 
- I.  Lit., the ham or hough, hock of a quadruped’s hind leg (opp. armus): articulum suffraginis contingere (cf. poples), Plin. 8, 45, 70, § 183: suffraginum artus in aversum flectunt, id. 11, 45, 101, § 248; Col. 6, 15, 2. 
Rarely of birds: aves ut quadripedes alas in priora curvant, suffraginem in posteriora, Plin. 11, 45, 102, § 249: aquilae pedes evellunt in aversum a suffragine, id. 30, 6, 18, § 54.  
- II.  Transf., a shoot, spray of a vine: suboles, quam rustici suffraginem vocant, Col. 4, 24, 4.
 
2. suffrāgo, āvi, 1, v. a.,  =  suffragor. 
- I.  In gen., to favor, support, vote for, Sisenn. ap. Non. 468, 12.
 
- II.  Absol. 
 
- 1.  To agree with, Pomp. ap. Non. 468, 7 (Com. Fragm. 106 Rib.).
 
- 2.  To proceed favorably: opera, Vulg. 3 Esd. 6, 10.