1. Impossible to subdue
   - indomitable, unsubduable

See also: unconquerable

• bacteriochlorophyll
• bacterioid
• bacterioidal
• bacteriologic
• bacteriological
• bacteriological warfare
• bacteriologist
• bacteriology
• bacteriolysis
• bacteriolytic
• bacteriophage
• bacteriophagic
• bacteriophagous
• bacteriostasis
• bacteriostat
• bacteriostatic
• bacterise
• bacterium
• bacterize
• bacteroid
• Bacteroidaceae
• bacteroidal
• Bacteroides
• Bactrian camel
• baculiform