1. Slyly and secretly
   "old line aristocratic diplomats underhandedly undermined the attempt...to align Germany with the Western democracies"
   - underhand

See also: underhand

• Promethean
• Prometheus
• promethium
• prominence
• prominent
• prominently
• promiscuity
• promiscuous
• promiscuously
• promiscuousness
• promise
• promised land
• promisee
• promiser
• promising
• promisingly
• promisor
• promissory
• promissory note
• promo
• promontory
• promote
• promoter
• promotion
• promotion system