1. Without warning or announcement
   - unannounced, unheralded

See also: unexpected

• banderole
• bandh
• bandicoot
• bandicoot rat
• banding
• bandit
• banditry
• bandleader
• bandlet
• bandmaster
• bandog
• bandoleer
• bandolier
• bandoneon
• bandora
• bandore
• bandsaw
• bandsman
• bandstand
• bandtail
• Bandung
• bandwagon
• bandwagon effect
• bandwidth
• bandy