Synonyms:
- artfully,
- astutely,
- cagily,
- cannily,
- cleverly,
- cunningly,
- deceitfully,
- foxily,
- fraudulently,
- furtively,
- indirectly,
- insidiously,
- knowingly,
- on the sly,
- shiftily,
- shrewdly,
- slick,
- slyly,
- smoothly,
- subtilely,
- subtlely,
- surreptitiously,
- treacherously,
- trickily,
- underhandedly,
- warily,
- wilily