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

See also: underhand

• classically
• classicise
• classicism
• classicist
• classicistic
• classicize
• classics
• classifiable
• classification
• classification system
• classificatory
• classified
• classified ad
• classified advertisement
• classified stock
• classifier
• classify
• classifying adjective
• classis
• classism
• classless
• classlessness
• classmate
• classroom
• classroom project