buckler
1. buck.ler \'b*k-l*r\ n [ME bocler, fr. OF, shield with a boss, fr. bocle] 1a: a small round shield held by a handle at arm's length and used to ward off blows 1b: a shield worn on the left arm to protect the front of the body 2: something or someone that shields and protects 2. buckler vt : to shield or defend with or as if with a buckler