surreptitious /sur-əp-tishˈəs/

1. Done by stealth or fraud
2. Stealthy

surreptiˈtiously adverb

• bombinated
• bombinates
• bombinating
• bombination
• bombinations
• bombing
• bombings
• bomb-ketch
• bomblet
• bomblets
• bombo
• bombora
• bomboras
• bombos
• bombproof
• bombproofs
• bombs
• bombshell
• bombshells
• bombsight
• bombsights
• bombsite
• bombsites
• bomb squad
• bomb-vessel