Meaning : Marked by deception.
Example :
Achieved success in business only by underhand methods.
Synonyms : underhand, underhanded
Meaning : Marked by quiet and caution and secrecy. Taking pains to avoid being observed.
Example :
A furtive manner.
A sneak attack.
Stealthy footsteps.
A surreptitious glance at his watch.
Synonyms : furtive, sneak, stealthy, surreptitious