surreptitious /sur-əp-tishˈəs/

1. Done by stealth or fraud
2. Stealthy

surreptiˈtiously adverb

• perched blocks
• percher
• percheron
• percherons
• perchers
• perchery
• perches
• perching
• perching birds
• perchings
• perchlorate
• perchlorates
• perchloric
• perchloroethylene
• Percidae
• perciform
• percine
• percing
• percipience
• percipiences
• percipiencies
• percipiency
• percipient
• percipients
• percoct