surreptitious /sur-əp-tishˈəs/

1. Done by stealth or fraud
2. Stealthy

• sea-wolf
• sea wolves
• seawoman
• seawomen
• seaworm
• seaworms
• sea-worn
• seaworthiness
• seaworthinesses
• seaworthy
• sea wrack
• sea wracks
• seaze
• seazed
• seazes
• seazing
• sebaceous
• sebaceous cyst
• sebaceous cysts
• sebaceous gland
• sebaceous glands
• sebacic
• sebacic acid
• se-baptist
• se-baptists