Meaning of the Sanskrit Word: bhusundibhih

  bhuçuëòébhiù—with bhuçuëòé weapons    SB 4.10.11-12
  bhuçuëòibhiù—by bhuçuëòis    SB 6.10.23
  bhuçuëòibhiù—with weapons called bhuçuëòi    SB 8.10.36

Can't find any compound Sanskrit words containing bhusundibhih.