boars back meaning in Chinese

• 猪背脊

• boar:    n. 1.(未阉的)公猪，公猪肉。 ...
• back:    n. 1.背，背部；背脊；背面，反面 ...
• boars:    猪属

Examples

1. The wild boar backed and filled as the wolves circled and took nips
   当狼围拢来进攻时，野猪来回走动，不知所措。